Scientists propose that eukaryotes formed when an Asgard archaeon entered into a close partnership with an alphaproteobacterium. Over time, the two organisms became permanently linked. The ...

When HHMI Investigator Amita Sehgal started studying sleep 25 years ago, the topic elicited a yawn from most biologists. "In ...

In the oceans and on land, scientists are discovering rare, transitional organisms that bridge the gap between Earth’s simplest cells and today’s complex ones.

Humans develop sharp vision during early fetal development thanks to an interplay between a vitamin A derivative and thyroid hormones in the retina, Johns Hopkins University scientists have found.

Microplastics have become a hot topic in environmental science — and a reliable source of alarming headlines. A new study ...

Corals living in coastal bays with strongly fluctuating temperatures and environmental conditions are better able to withstand heat and other stressors than their counterparts on more stable reefs.

After decades, scientists have finally pieced together the 23-step biosynthetic pathway to produce this cancer drug ...