Modern humans and more ancient hominins interbred many times throughout Eurasia and Africa, and the genetic flow went both ways.
At stake are fundamental ideas about how black holes form — and a six-way bet.
In the “underground economy” for soil nutrients, fungi strike hard bargains and punish plants that won’t meet their price.
The theoretical particle physicist Ann Nelson, who died on August 4 at age 61, was a font of brilliant ideas and a champion of ending discrimination in the field.
Mathematicians and neuroscientists have created the first anatomically accurate model that explains how vision is possible.
Researchers agree it’s a long shot, but transmissible cancers could theoretically evolve into independent species. Certain weird parasites might be living proof.