Feature
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PaleontologyBack from the Dead?
The long-term disappearance of creatures from the fossil record and their later reemergence can provide insights into ancient environmental conditions and the trustworthiness of the fossil record itself.
By Sid Perkins -
EcosystemsTortoise Genes and Island Beings
Geneticists and conservation biologists are joining forces to untangle the evolutionary history of giant Galápagos tortoises and to safeguard the animals' future.
By Bryn Nelson -
Health & MedicineMother Knows All
Fragments of a fetus' genetic material that leak into a pregnant woman's bloodstream reveal details of early fetal development.
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AstronomyGammas from Heaven
An orbiting gamma-ray observatory, set for launch next spring, will seek out the most violent events in the cosmos.
By Ron Cowen -
AnthropologyFossil Sparks
Two new fossil discoveries and an analysis of ancient teeth challenge traditional assumptions about ape and human evolution.
By Bruce Bower -
EarthThe Big Dry
Parts of Australia have suffered from severe drought for more than a decade, and people, vegetation, and animals are feeling the heat.
By Emily Sohn -
TechVirtual Worlds, Real Science
Epidemiologists and social scientists are tapping into virtual online worlds inhabited by millions to collect data with real-world uses.
By Brian Vastag -
Stem Cells from Virgin Eggs
Making embryonic stem cells from unfertilized eggs might bypass many ethical concerns, but important scientific hurdles remain.
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Not Just Hitchhikers
Salmonella and other human pathogens on vegetables aren't just riding along like casual smears of dirt; they're moving in and setting up housekeeping.
By Susan Milius -
EarthInvasive, Indeed
Some people may live lightly on the land, but the demands of the world's population as a whole consume nearly a quarter of Earth's total biological productivity.
By Sid Perkins -
TechDisappearing Ink
Coming to your tattoo parlor soon: New inks that allow clients to have their designs cleanly erased if embarrassment or regret sets in.
By Corinna Wu -
PlantsStalking the Green Meat Eaters
Pitcher plants in a New England bog hold little ecosystems in their leaves, and also act as indicators of the bog's ecological health.
By Susan Milius