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At six months, the Zoo's first sloth cub in seven years made his public debut
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Why is a snail variety found only in Ireland and the Pyrenees? DNA analysis suggests that it hitched a boat ride with early travelers
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The region's cool forests and plentiful rivers make it home to more salamander species than any other part of the world
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The presence of whipworm and roundworm eggs suggest that crusaders were especially predisposed to death by malnutrition
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Before hatching, a baby turtle can deliberately move between warm and cool patches within its egg--a behavior that may help determine its gender
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Which came first, the chicken or the egg? Scientists figured the answers to this and other pressing questions once and for all
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Beachgoers despise the stinging animals, but photographer Aaron Ansarov finds surreal beauty in them
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Special patches of trees shield deer from harsh winter weather, but deer urine stimulates growth of competitive plants in those havens
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Since the last World Oceans Day, we've documented trash in the deep sea, sea snails with acid-weakened shells, high ocean temperatures and more
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Comparing the body language of baby chimps, bonobos and humans suggests that gesticulation came first in the evolution of speaking
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Developing bird embryos do have penis precursors, it turns out, but a genetic signal causes the penis cells to die off during gestation
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Contrary to memes circulating online, lobsters can't live forever—but they do keep growing and growing until they die
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Cracking the Code of the Human Genome
Smithsonian scientists are gathering wildlife tissue samples from around the world to build the largest museum-based repository
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A century after toucans and toucanets disappeared from patches of Brazilian jungle, trees have evolved to have smaller, weaker seeds
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Mark Fischer, a software developer in California, turns data from recordings of whales, dolphins and birds into psychedelic art
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People in Brazil living close to forests are 25 times more likely to catch malaria than those living near places where all the trees have been cut down
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She arrives at the National Zoo today from Baton Rouge
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From "where there's smoke, there's fire" to "hard as nails," several sayings just don't pass scientific scrutiny
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In a new exhibition, the university showcases 43 images rooted in scientific research that force viewers to contemplate the definition of art
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Marine species threatened with extinction aren't just whales, seals and turtles--they include fish, corals, mollusks, birds, and a lone seagrass
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