Was North America populated by 'stepping stone' migration across Bering Sea?
Global glacier retreat has accelerated
Mammals evolved big brains after big disasters
Covid 19 Herd Immunity Calculator Released - Lets high schoolers track Herd immunity progress
Icy clouds could have kept early Mars warm enough for rivers and lakes
A new perspective on the genomes of archaic humans
Genetic effects of Chernobyl radiation
Mars has right ingredients for present-day microbial life beneath its surface, study finds
Experimental drug shows potential against Alzheimer's disease
Among COVID-19 survivors, an increased risk of death, serious illness