News
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EarthGlass bits, charcoal hint at 56-million-year-old space rock impact
Glassy debris and the burnt remains of wildfires suggest that a large space rock hit Earth near the start of the Paleocene-Eocene Thermal Maximum warming event around 56 million years ago.
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Health & MedicineConcern expands over Zika birth defects
Infection with Zika virus in utero can trigger a spectrum of birth defects beyond microcephaly, and could potentially cause long-term health problems as well.
By Meghan Rosen -
PaleontologyAncient microbe fossils show earliest evidence of shell making
Armor-plated, 809-million-year-old fossilized microbes discovered in Canada are the oldest known evidence of shell making.
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AnimalsNew case emerging for Culex mosquito as unexpected Zika spreader
The much-debated proposal that a Culex mosquito could help spread Zika gets some international support.