News

Life

Lab-engineered organism fights malaria

A new breed of poison-secreting fungi can kill parasites in a mosquito.

Humans

U.S. probably began global fire ant spread

A genetic study shows that recent international invasions likely originated in the U.S. South, not the species’ native South American range.

Chemistry

Mad cow-type diseases lie in wait

Prion infections build quickly in the brain then pause before killing, new research suggests.

Health & Medicine

News in brief: Body & Brain

Baby's first bites make a big impression, and so do European biomedical journals, in this week's news.