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Wild wings heading north     In late November 1996, 10 Snow Geese were tagged on their necks with lightweight satellite radios by members of the U.S. Geological Survey. In late February '97, the flock of snow geese started their journey north to their nesting grounds in the western Canadian Arctic. Find out about their journey and learn about animal migration. From Wild Wings: Heading North http://north.audubon.org/

History of Pi     Examine pi computation tables starting about 2000 BCE and learn about the current advances in computation of Pi. Lacking explanations or general overview. From The Pi Pages http://www.cecm.sfu.ca/pi/pi.html

Amusement park physics     How do physics laws affect amusement park ride design? Participating in a hypothetical design of the rides. From Exhibits Collection -- Amusement Park Physics http://www.learner.org/exhibits/parkphysics/

Animal hospital     Many a pet's life ends simply because inappropriate behavior leads the owner to "put the animal to sleep." On this Web site you can find out more about the problem, review questions and answers with specialized animal behaviorists, and test your knowledge of more exotic animals. Information is communicated in text narrative form, and in the form of question and answer. Limited content. From NOVA Online | Animal Hospital http://www.pbs.org/wgbh/nova/vets/

Introduction to polarizing light microscopy     Guide through the basics of polarizing light microscopy, in particular as it pertains to the identification of pigments. It includes description of optical microscopy basics, microscope basics, and sample descriptions of pigments according to criteria such as measurement, shape, color, transparency, and homogeneity. Includes a practice session. From An Introduction to Polarizing Light Microscopy http://www.sewanee.edu/chem/Chem%26Art/MS/index.htm

NIST Reference on Constants, Units and Uncertainty     Values for certain fundamental physical constants and articles about selected constants. From Fundamental Physical Constants from NIST http://physics.nist.gov/cuu/Constants/index.html

Alternative medicine     The uneasy relationship between conventional and alternative medicine. Some charts and data on types of medical treatments. From Alternative medicine under the microscope http://whyfiles.org/076alt_med/

Human biology     Collection of tutorials and quizzes relevant to human biology. Covers topics such as human reproductive biology, birth control, genetics and more. From The Biology Project: Human Biology http://www.biology.arizona.edu/human_bio/human_bio.html

Immunology     Introduction to basic immunology, case studies, and activities design to achieve understanding of the Elisa assay and western blotting analysis. From The Biology Project: Microbiology & Immunology http://www.biology.arizona.edu/immunology/immunology.html

Flights of Inspiration     First flight made by brothers Wilbur and Orville Wright. Learn about the first non-stop transatlantic flight by John Alcock and Arthur Whitten Brown. Design and test your own model aircraft, as well as understand scientific principles that make flights possible. From Flights of Inspiration http://www.fi.edu/flights/index.html

Senses and Sensitivity     Neuronal Alliances for Sight and Sound. Explore the elegantly simple sensory system of the leech for detecting mechanical sensation such as touching, pushing and pinching on its slimy body surface. The leech's nervous system is very simple and easily accessible. Principles discovered in simple systems may be relevant in trying to understand the human brain. From holidaylectures.org - Neurobiology http://www.hhmi.org/grants/lectures/97lect/

Collapse: why do civilizations fall?     Explore the collapse of four ancient civilizations in order to understand what awaits our own. Learn what happens when a society collapses and how archaeologists find and interpret evidence. From Exhibits Collection -- Collapse http://www.learner.org/exhibits/collapse/

Andes Expedition: Searching for Inca Secrets     Virtual autopsy of the ice maiden that was killed five hundred years ago as a sacrifice to the gods in the Inca empire. The maiden's body preserved remarkably well. There is also a description of the expedition to the Andes led by Johan Reinhard, aimed to discover more Inca religious sites. Attractive graphics, but limited content. From Andes @ nationalgeographic.com http://www.nationalgeographic.com/andes/index.html

Asteroids: deadly impact     While playing an FBI detective the user learns to distinguish between asteroids, meteors, comets and meteorites. Major stellar bodies collisions with the Earth are also described. Limited content. From Asteroids: Deadly Impact @ nationalgeographic.com http://www.nationalgeographic.com/asteroids/index.html

Cats: Plans for Perfection     Explore how nature "designed" the cat by examining cat's skeletal, and muscular systems, coat, behavior, and explore a cat's gallery. From Cats @ nationalgeographic.com http://www.nationalgeographic.com/cats/index.html

Crittercam Chronicles     Crittercam: a camera that is designed to be worn by water animals such as sharks and turtles in order to explore their daily activities. From The Crittercam Chronicles @ nationalgeographic.com http://www.nationalgeographic.com/crittercam/

At the Tomb of Tutankhamen     Opening of the royal Egyptian sepulcher of Tutankhamen which contained the most remarkable funeral treasures. The account is given in the form of diary of the witnesses, which actually has appeared in the National Geographic earlier. Site also contains a list of resources about Egypt history. Limited content. From At the Tomb of Tutankhamen @ nationalgeographic.com http://www.nationalgeographic.com/egypt/index.html

El Niño and La Niña: Nature's Vicious Cycle     Hurricanes El Niño and La Niña. Read about some people's personal encounters with the hurricanes, explore how scientists now are able to predict certain weather changes, and find many web resources dedicated to El Niño and La Nina. From El Niño @ nationalgeographic.com http://www.nationalgeographic.com/elnino/index.html

Everest: Measure of a Mountain     Scientists and climbers are using the global positioning system (GPS) and radar to measure the height of Mount Everest. Learn about the body's reaction to heights and read the latest dispatches from people trying to climb the highest mountain in the world. From Everest @ nationalgeographic.com http://www.nationalgeographic.com/everest/index.html

Habitats: the Growth of Forests     Deep in the Monongahela National Forest of West Virginia, an experiment unfolds. The United States Forest Service has set aside four plots in the woods for study. Each shows a forest at a different stage of growth: 2 years, 12 years, 41 years, and about 86 years. Together the plots demonstrate natural succession: the process by which a forest evolves. From Habitats @ nationalgeographic.com http://www.nationalgeographic.com/habitats/index3.html

Kaikoura     Join an international team of scientists as they probe New Zealand's Kaikoura Canyon in an effort at spotting the elusive giant squid. From Kaikoura @ nationalgeographic.com http://www.nationalgeographic.com/kaikoura/index.html

King cobra     Get familiar with king Cobra. Study its habits, anatomy, and myths and legends about it. Difficult to use, but interesting. From National Geographic: Interactive King Cobra http://www.nationalgeographic.com/kingcobra/index.html

Forbidden territory     Stanley and Livingstone's magnificent trip to Africa. Learn about their discoveries and view the slides of Africa that Livingstone was the first to take. From Forbidden Territory @ nationalgeographic.com http://www.nationalgeographic.com/lantern/index.html

Lewis and Clark Online Base Camp     Lewis and Clark's sitings on their way of exploring the west. Learn where they made stops and what they did. From Lewis & Clark @ nationalgeographic.com http://www.nationalgeographic.com/lewisclark/index.html

Lightning: the Shocking Story     Get the science and the stories behind the bolts that strike our earth a hundred times every second. From Lightning @ nationalgeographic.com http://www.nationalgeographic.com/lightning/index.html

Ice Treasures of the Inca     Climb Peru's Mount Ampato following the path of the ancient Inca in a re-creation of an actual expedition that took place in 1995. The site is done mostly in a narrative text format. From Ice Treasures of the Inca @ nationalgeographic.com http://www.nationalgeographic.com/mummy/index.html

Fallout: Eye on the Volcano     Eruptions from a crater that suddenly reawakened in 1995, after centuries, have tormented the tiny Caribbean island of Montserrat for almost three years. Find out how planetary forces laid the groundwork for the eruption, how the toxic fallout affected the island's population and what it has been like living with the fallout of the volcano. From Fallout @ nationalgeographic.com http://www.nationalgeographic.com/volcanoes/index.html

Inside the White House     Play a game of choices and learn what it is like to be a president in the Oval Office. From Inside the White House @ nationalgeographic.com http://www.nationalgeographic.com/whitehouse/noenter.html

America quilts     Rich history, art and personal stories of quilt-making in America. From PBS-Quilts http://www.pbs.org/americaquilts/

Out of the Past     400 Years of Lesbian and Gay History in America. Articles and personal accounts. From PBS: Out Of The Past http://www.pbs.org/outofthepast/

A science odyssey     Compare the advances that science has made between 1900 and today. From A Science Odyssey: Then+Now Menu http://www.pbs.org/wgbh/aso/thenandnow/

Surviving AIDS     Cutting edge AIDS research, and what scientists are learning about preserving the immune system and marshalling the body's natural defenses against HIV to keep infected people from progressing to AIDS. Contains a description of the body's immune system both in text and Shockwave format, QT movies illustrating the HIV life cycle, information on a vaccine research. Also contains six world maps indicating the effect of HIV on different continents and populations. Companion site to television show. Somewhat difficult to use. From NOVA Online | Surviving AIDS http://www.pbs.org/wgbh/nova/aids/

Balloon Race Around the World     Delve into the history of science and ballooning, follow the attempts of earlier balloonists to make the round-the-world flight, and take a virtual trip around the world in a balloon, and read an interview with Steve Fossett. Poor navigation. Limited content. From NOVA Online | Balloon Race Around the World http://www.pbs.org/wgbh/nova/balloon/

Bombing of America     Investigative process that occurs following a bomb explosion. Among the subjects discussed are the scientific methods used to identify the chemical content of the bomb, tragic facts about juvenile bombers, and analysis of the evidence obtained from the Unabomber From NOVA Online/Bombing of America http://www.pbs.org/wgbh/nova/bombing/

Coma     Head injury can lead to coma, learn what options doctors have available to them in preventing and treating coma. Also, get a "translation" of a medical dialogue from a TV show "Chicago Hope." The web site is very much text based. From NOVA Online | Coma http://www.pbs.org/wgbh/nova/coma/

Everest the Search for Mallory and Irvine     Follow an actual expedition to Mt. Everest, and look for evidence that two British climbers could have reached the highest point thirty years prior to Sir Edmund Hillary and Tenzing Norgay, who are known to hold the honor since 1953. Contains narration and interviews with experts. Poorly organized. From NOVA Online | Lost on Everest http://www.pbs.org/wgbh/nova/everest/

Fast cars     History of fast cars and about people's attempts to design and drive a car than can travel faster than the speed of sound. From NOVA Online | No Longer Available http://www.pbs.org/wgbh/nova/fastcars/

Flood!     History of floods caused by major rivers such as Nile, Mississippi, and others. Learn about the Midwestern flood of 1993, the benefits of floods, and more. From NOVA Online | Flood! http://www.pbs.org/wgbh/nova/flood/

Hawaii: Born of Fire     Be next to an active volcano. Also learn what makes Hawaii a place where exists such a tremendous number of species. From NOVA Online/Hawaii- Born of Fire http://www.pbs.org/wgbh/nova/hawaii/

Cracking the Ice Age     Ice periods and earth's global warming. Learn how scientists can tell the continents are moving. Limited content. From NOVA Online/Cracking the Ice Age http://www.pbs.org/wgbh/nova/ice/

Leopards of the Night     How leopards see at night and how a television crew filmed leopards at night. From NOVA Online | Leopards of the Night http://www.pbs.org/wgbh/nova/leopards/

Beast of Loch Ness     Examples of real animals once thought to be nonexistent, and myths and legends behind the discoveries of those animals, such as Africa's ocapi. There is also a narration of how the legend of Loch Ness monsters came to be and eyewitness accounts. There are experiments with sonar and descriptions of how the sonar works. The site is done mostly using text narration and images. From NOVA Online | The Beast of Loch Ness http://www.pbs.org/wgbh/nova/lochness/

Bomb squad     Bomb disposal units are increasingly relying on robots to take over the dangerous task of finding and defusing bombs. But robots are also taking an other hazardous duties, and their capabilities are evolving rapidly. What might they be capable of in the next century? Take a trip into the world of robots. From NOVA Online | Bomb Squad http://www.pbs.org/wgbh/nova/robots/

Island of the Sharks     Costa Rica's Cocos Island boasts more sharks per cubic yard of water than perhaps any other place on the planet, including whitetip reef sharks, 40-foot whale sharks, and hammerheads that school by the hundreds. On this latest NOVA/PBS Online Adventure, we joined Howard and Michele Hall, two of the world's leading underwater filmmakers, as they dove into this shark-infested paradise to shoot an IMAX large-format film. From NOVA Online | Island of the Sharks http://www.pbs.org/wgbh/nova/sharks/

Doomsday asteroid     Composition and origin of comets. Learn about the recently discovered Hale-Bopp and the Hyakutake comet. Make "kitchen" comets using dry ice (It's fun, it's a mess, and it's one of the most memorable and scientifically accurate demonstrations in astronomy!). From NOVA Online | Doomsday Asteroid http://www.pbs.org/wgbh/nova/spacewatch/

Deadly Shadow of Vesuvius     Tells the story of the Roman city of Pompeii and the risk that Vesuvius presents today. Learn how volcanologists can predict eruptions. See how a successful large-scale emergency plan was carried out in 1994 eruption of the Rabaul volcano in Papua New Guinea. From NOVA Online | Deadly Shadow of Vesuvius http://www.pbs.org/wgbh/nova/vesuvius/

Alien worlds     Constellations of stars and the origins of planets. Find out what signs of life beyond Earth have been found, and what would disclose life in outer space for sure. From NOVA Online/Hunt for Alien Worlds http://www.pbs.org/wgbh/nova/worlds/

Savage earth     Earthquakes, volcanoes, tsunamis, and other natural disasters. Highlights include animated illustrations, original articles and sidebars, Ask the Experts, photos, and video downloads. Companion site for TV show. From SAVAGE EARTH Online http://www.pbs.org/wnet/savageearth/

Innovative lives     Collection of biographies and major achievements of selected inventors, both from the near past and the present. From Innovative Lives http://www.si.edu/lemelson/centerpieces/ilives/index.html

Calendars Through the Ages     Explore the fascinating history of the human endeavor to organize our lives in accordance with the sun and stars. Historical information and FAQ's on various calendars' years, months, and days of the week. Includes Julian, Gregorian, Jewish, Islamic, Chinese, Mayan, and others. From Calendars through the Ages - Home http://webexhibits.org/calendars/

Discovery of the Electron     Read, see, and hear about J. J. Thomson's 1897 experiments, which helped bring understanding of the electron as a fundamental unit of matter. From The Discovery of the Electron http://www.aip.org/history/electron/

Heisenberg: Quantum Mechanics and the Uncertainty Principle     Werner Heisenberg was one of the greatest physicists of the twentieth century. He is best known as a founder of quantum mechanics, the new physics of the atomic world, and especially for the uncertainty principle in quantum theory. He is also known for his controversial role as a leader of Germany's nuclear fission research during World War II. From Heisenberg / Uncertainty Principle - Werner Heisenberg and the Uncertainty Principle http://www.aip.org/history/heisenberg/

Biochemistry     Problem sets and tutorials in the areas of biochemistry including chemistry, large molecules, acids and bases, pH, energy, enzymes, metabolism, photosynthesis and more. The material is mostly presented in the form of quizzes that lead the user to a tutorial if a wrong answer is given. Material presented with text and still images. From The Biology Project: Biochemistry http://www.biology.arizona.edu/biochemistry/biochemistry.html

Cell biology     Introduce yourself to the cell as the fundamental unit of life and the scientific method. Review the cell cycle, learn about the cells that make up all living systems, their organelles, and the differences between living cells and viruses From The Biology Project: Cell Biology http://www.biology.arizona.edu/cell_bio/cell_bio.html

Chemicals and Human Health     Explore the world of renal toxicology, and learn the effect of metals on the kidneys. Discover ways chemicals can affect human health. Review lung anatomy and learn about diseases of the lungs, and environmental tobacco smoke. From The Biology Project: Chemicals & Human Health http://www.biology.arizona.edu/chh/

Developmental biology     Basic concepts of development in a variety of organisms. Learn about the experiments that gave scientists in the early 20th century insight into the mechanisms of development. From The Biology Project: Developmental Biology http://www.biology.arizona.edu/developmental_bio/developmental_bio.html

Chauvet-Pont-d'arc Cave     Exceptional archeological discovery of a decorated cave. In 1995, fantastic Paleolithic Period cave paintings in the Ardèche gorges of France. Includes photos of several paintings and a discussion of the archaeological importance of the discovery. Also lists other significant French prehistoric finds. From ERROR http://www.culture.fr/culture/arcnat/chauvet/en/

Blazing a Genetic Trail     Colorful web book describing the excitement in biomedical research as scientists discover the causes of baffling diseases: abnormal genes. Includes: family studies; the Human Genome Project; and how to conquer hereditary diseases like cystic fibrosis. From HHMI's Blazing a Genetic Trail: Research on Mutant Genes and Hereditary Diseases. http://www.hhmi.org/genetictrail/

Exploring Leonardo     Leonardo da Vinci's greatest inventions. Find out about the Renaissance paintings, and learn unique facts about da Vinci, such as he was left handed and wrote from right to left in Italian. Attractive, but difficult to use. From Leonardo Home Page http://www.mos.org/sln/Leonardo/

Dinorama     Dinosaur fossil discovery. Learn about the largest dinosaurs that existed and dinosaur eggs that have been found almost intact. From Dinorama @ nationalgeographic.com http://www.nationalgeographic.com/features/dinorama/frame.html

Land of Genghis Khan     Great legend of Genghis Khan. View the map of his ancient empire. Learn about Mongolia today. From Genghis Khan @ nationalgeographic.com http://www.nationalgeographic.com/genghis/index.html

Electric Ballerina     Watch an animation of difficult ballet elements such as fouettes, and jumps. The electric ballerina demonstrates ballet technique and makes use of a basic principle in physics. From The Electric Ballerina http://www.novia.net/~jlw/electric/electric.html

Transistorized!     The transistor: the most important invention of the 20th century. Learn about the scientific bases of how transistor works. From Transistorized! The History of the Invention of the Transistor - Home Page http://www.pbs.org/transistor/index.html

Into the Abyss     A mile and a half beneath the sea off the Pacific Northwest coast, a volcanic ridge has given birth to towering structures that spew toxic, superheated water. The structures, known as black smoker chimneys, are home to bizarre life forms that thrive far beyond the reach of the sun's light. Follow the daring attempt of an ambitious expedition to retrieve several of these black smokers from the seafloor. From NOVA Online | Into the Abyss http://www.pbs.org/wgbh/nova/abyss/

Exploring the Alien Abduction Phenomena: Kidnapped By UFOs?     Accounts of alien abduction. Read the experts' opinions about the abductions - some experts are believers, while others are skeptics. From NOVA Online/Kidnapped By UFOs? http://www.pbs.org/wgbh/nova/aliens/

Avalanche!     Go behind the scenes to see how natural disasters are captured on film. Learn how the movie Avalanche was shot and the elements of an avalanche. From NOVA Online | Avalanche! http://www.pbs.org/wgbh/nova/avalanche/

Faster than sound     It has been 50 years since test pilot Chick Yeager broke the sound barrier. Learn about those early days, discover what creates a sonic boom, or find out about the latest attempts to beat speed records on land, water, and in the air. From NOVA Online | Faster Than Sound http://www.pbs.org/wgbh/nova/barrier/

Crocodiles!     What is it about crocodiles that has enabled them to live for at least 240 million years, outlasting even the dinosaurs? This site is the ultimate guide to crocodiles, with everything from their survival strategies to the basics on all 23 species, to what it's like to wrestle with a half-ton Nile crocodile in the wild. From NOVA Online | Crocodiles http://www.pbs.org/wgbh/nova/crocs/

Einstein revealed     Timeline of Einstein's life and discoveries. Get a general explanation of his principle of relativity and light mechanics. From NOVA Online/Einstein Revealed http://www.pbs.org/wgbh/nova/einstein/

Escape     Brief chronicle of what engineers have learned from past disasters to make accidents increasingly survivable. Explore the myriad safety features that have progressively appeared in cars, planes, lifeboats and other machines. Learn what can happen to mind and body during and immediately after an accident. From NOVA Online | Escape! http://www.pbs.org/wgbh/nova/escape/

The Brain Eater     What causes Mad Cow disease? Is there a new type of infectious agent - a prion - that's responsible? What happens when science faces an unknown pathogen, and what are the implications for public health? Explore these questions and more. Limited content. From NOVA Online | The Brain Eater http://www.pbs.org/wgbh/nova/madcow/

Kingdom of the Seahorse     Seahorses: read an interview with seahorse crusader Amanda Vincent. From NOVA Online | Kingdom of the Seahorse http://www.pbs.org/wgbh/nova/seahorse/

Mysteries of Catalhoyuk     Mysteries of the Catalhoyuk, the site of an ancient city in Turkey. Look at the pictures of burials, and discuss your findings in the bone lab. Explore why the dead were buried in the floor of the house where people used to leave, and find out what people were eating for dinner 10,000 years ago. From Mysteries of Çatalhöyük http://www.sci.mus.mn.us/catal/top.html

Thomas Alva Edison     Life, thoughts and discoveries of the great inventor Thomas Edison. From Lemelson Center Invention Features: Thomas Edison http://www.si.edu/lemelson/edison/html/thomas_alva_edison.html

Exploration of the Earth's Magnetosphere     Brief tour of magnetosphere, a space region dominated by the Earth's magnetic field. Includes a quick overview of the relevant physical sciences - magnetism, ions and electrons, plasmas etc. - and also includes tidbits of history, accessible by a "history button" at the ends of many sections. From The Exploration of the Earth's Magnetosphere http://www-spof.gsfc.nasa.gov/Education/Intro.html

Einstein: Image and Impact     Einstein's biography. Learn about his greatest inventions in chronological order. Hear his voice explain his famous equation. From Einstein-Image and Impact. AIP History Center exhibit. http://www.aip.org/history/einstein/

How stuff works     How everyday stuff works such as TV, refrigerator, airplane, solar cells and much more. From HowStuffWorks - Learn how Everything Works! http://www.howstuffworks.com/

Famous American trials     Contains accounts, maps, photos, transcript excerpts and other materials relating to famous American trials, including the Leopold & Loeb Trial, the Scopes Monkey Trial, the Andersonville Court Martial, the Scottsboro Boys Trials, the Haymarket Trial, The Lincoln Assassination Trials, the Manson Trial, the My Lai Courts-Martial, the Kelly Michaels Trial, and the Hauptmann (Lindbergh Kidnapping) Trial. From Famous Trials - UMKC School of Law - Prof. Douglas Linder http://www.law.umkc.edu/faculty/projects/ftrials/ftrials.htm

Cinema: how are Hollywood films made?     Explore the creative process of movie making from the screenwriter's words to the editor's final cut. Write your own dialogue for a scene or put yourself in a producer's shoes by managing the production of a film. Includes excellent links. From Exhibits Collection -- Cinema http://www.learner.org/exhibits/cinema/

Garbage     Waste disposal handling and what can be done to improve garbage processing and save environment. From Exhibits Collection -- Garbage http://www.learner.org/exhibits/garbage/

Coffee     Coffee: legends, maps of coffee growing regions, different roasts, coffee. From Coffee @ nationalgeographic.com http://www.nationalgeographic.com/coffee/index.html

Dinosaur eggs     Join us now for an online egg hunt and catch the excitement of fossil researchers as they "hatch" fossilized dinosaur eggs to reveal the embryos inside. Tour our museum of dinosaur hatchlings, meet the modelers. From Dinosaur Eggs @ nationalgeographic.com http://www.nationalgeographic.com/dinoeggs/index.html

Cut to the Heart     Anatomy of the human heart, and the history of heart surgery. Look at pictures of hearts affected by an illness. From NOVA Online | Cut to the Heart http://www.pbs.org/wgbh/nova/heart/

Ice mummies     Process of mummification and about how scientists study mummies that they find. Learn about the Peruvian expedition of 1996. From NOVA Online | Ice Mummies http://www.pbs.org/wgbh/nova/icemummies/

Kaboom!     Anatomy of a Firework, the chemical makeup of pyrotechnic display, and an interview with Stacey Loizeaux, Demolition Woman. Requires plug-in, Macromedia Shockwave. From NOVA Online/Kaboom! http://www.pbs.org/wgbh/nova/kaboom/

Buckminster fuller: Thinking out loud     Architectural and other inventions of the great Buckminster Fuller. An architect, designer, engineer, poet, philosopher, author and global iconoclast, Fuller was a true visionary, a Renaissance man best remembered as creator of the geodesic dome. Find out about the geodesic dome, dymaxion house, transport, megastructures and more. From www.pbs.org/wnet/bucky.cgi http://www.thirteen.org/bucky/

Frogs     Frogs: their anatomy, habitats, eating patterns, courtship. Few people realize just how ancient frogs are. For 190 million years, the ancestors of modern frogs have roamed (if not ruled) the earth, looking much the same as they do today. From Exploratorium: Frogs http://www.exploratorium.edu/frogs/