News
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Health & MedicinePrion Proof? Evidence grows for mad cow protein
Misfolded proteins known as prions can cause disease when injected into the brains of genetically engineered mice.
By Nathan Seppa -
HumansEPA to fine DuPont over ingredient in Teflon
The Environmental Protection Agency says it may levy a fine surpassing $300 million against DuPont for concealing evidence that it was contaminating the environment with perfluorooctanoic acid.
By Ben Harder -
Brain development disturbed in autism
A brain-imaging study suggests that autism is characterized by disturbances in the development of the amygdala and the hippocampus, two inner-brain structures.
By Bruce Bower -
PaleontologyEarly life forms had a modular structure
Fossils recently discovered in northeastern Newfoundland reveal that some of Earth's earliest large organisms had modular body plans whose main architectural element was a branching, frondlike structure.