EvolutionJuly 13, 2011
First Humans Who Left Africa Continued to Mate with Africans
The first humans to leave Africa continued to interbreed with Africans for tens of thousands of years.
Archaeology
July 13, 2011
Nature's Nuclear Reactors: The 2-Billion-Year-Old Natural Fission Reactors in Gabon, Western Africa
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EvolutionJuly 13, 2011
'Youngest' Dinosaur Fragment Sparks Dispute Over Gradual Extinction Theory
Scientists dispute fossil's significance to the extinction debate.
July 6, 2011
Jaws did not dominate early oceans
EvolutionJuly 6, 2011
Microbial Mat Bears Direct Evidence of 3.3 Billion-Year-Old Photosynthesis
Mat of microbes contains calcium carbonate that could only have formed through photosynthesis.
July 5, 2011
Dinosaur Egg Clutches, Not as Simple as Chicken Eggs
EnvironmentJuly 1, 2011
The Last Great Global Warming
Surprising new evidence suggests the pace of Earth's most abrupt prehistoric warm-up paled in comparison with what we face today. The episode has lessons for our future
EnvironmentJuly 1, 2011
Recommended: The Book of Fungi: A Life-Size Guide to 600 Species from Around the World
Books and recommendations from Scientific American
EnvironmentJune 29, 2011
Climate Researchers Seek Global Warming Clues in the Arctic's Svalbard Archipelago [Slide Show]
Rocks on a remote Norwegian island in the Arctic Ocean may offer fresh insights into previous worldwide climate change episodes
EvolutionJune 24, 2011
Defending Stephen Jay Gould's Crusade against Biological Determinism
June 23, 2011
We Visit Fishy Relatives, Geology Wonderland
June 22, 2011
Go to Landfill, Find a Dinosaur Footprint!