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What Does Gravity Do?

Illustrations: Jim Paillot

A quick explanation of why we care about gravity.

What kind of life are we looking for on Mars?

Illustrations: Jim Steck

A fun test of what you know about the search for life on the red planet.

What would happen if the force of gravity were turned off?

Photos: Girl: courtesy of Denis Finnin, AMNH; Baseball: courtesy of Denis Finnin, AMNH; Illustrations: Newton: Amanda Duffy; Foot: Jim Paillot; Juggler: Chris Van Dunsen; Mars: Daryl Collins

A thought experiment that asks you to imagine a world without gravity's influence.

Why Can't I See More Stars?

Photos: Neil at 12 with Dad: courtesy of Neil de Grasse Tyson; Neil today: courtesy of Denis Finnin, AMNH; Illustrations: Jim Paillot

Tips for beginning stargazers.

Cosmic Wallpapers

Photos: © AMNH

Decorate your desktop with these starry images!

What do you know about Stars?

Test your starry knowledge in this stellar quiz!

In Pictures: Journey to the Stars

In the Milky Way Galaxy alone, there are hundreds of billions of stars. But that hasn't always been the case...

Bio Poll

Photos: American toad, Asian multicolored ladybeetle, blood star, blue poison frog, blue-ring top snail, boojum tree, formosan subterranean termite, french angelfish, greater bird of paradise, green acouchi, hygroscopic earthstar, long-tailed salamander, jelly bellies, Mexican redknee tarantula, owl butterfly, radiated tortoise, red spotted newt, rosy periwinkle, sally lightfoot crab, ten spot skimmer dragonfly, the sickener, tusked chameleon, varroa mite, whitespotted boxfish, white's treefrog, witch's butter, yellow fever mosquito: refer to Tree of Life Organism Pages imagery credits; aye-aye: courtesy of Connie Bransilver, Duke University Primate Center buffalo trunkfish (fishes swim): courtesy of John White, California Academy of Sciences; butterfly, city, desert, forest, garbarge, hummingbird, ocean, pigeon, plants, squirrel, volunteer your time, white-tailed spider: AMNH; Carolina parakeet, horned lizard: courtesy of AMNH Department of Library Services; coral: courtesy of Discovery Channel Online; giant squid: AMNH, Hall of Biodiversity; ladybug: courtesy of Albert P. Bekker, California Academy of Sciences; passenger pigeon: AMNH; halls praying mantis: courtesy of Gladys Lucille Smith, California Academy of Sciences; Illustrations: Dzanga-Sangha: Laura Friedman; great auk: courtesy of AMNH Department of Library Services, #6266, extinct 1844. By Charles Hamilton Smith, from Charles Hamilton Smith,Original Drawings, 1795-1859. 23 vols; laughing owl: courtesy of AMNH Department of Library Services, #6253, extinct New Zealand, c. 1914. By John G. Keulemans, from G. D. Rowley, Ornithological miscellany, vol. 1. London: 1875.; O'ahu 'O'o: courtesy of AMNH Department of Library Services, #6286, By John G. Keulemans, from Lionel Walter Rothschild, The avifauna of Laysan and the neighbouring islands, London, 1893-1900; recycle: Eric Hamilton seaweed, soybeans, olive branch, cinnamon: Patricia Wynne

Make your opinion count!

Bio-Benefits

Illustrations: Eric Hamilton

Did you know that biodiversity provides us with things that we need?

Biodiversity Books

Explore biodiversity with these 12 books.

American Museum of Natural History

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New York, NY 10024-5192
Phone: 212-769-5100

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