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Studies suggest that epigenetics allows some learned adaptive responses to be passed down to new generations. The question is how.
Modern humans and more ancient hominins interbred many times throughout Eurasia and Africa, and the genetic flow went both ways.
Researchers struggle to incorporate ongoing evolutionary discoveries into an animal classification scheme older than Darwin.
Surviving fragments of genetic material preserved in sediments allow scientists to see the full diversity of past life — even microbes.
New work raises the estimated diversity of viruses in the seas more than twelvefold and lays the groundwork for a better understanding of their impact on global nutrient cycles.
The rainbow of pigments that animals use for blood illustrates a central truth of evolution.
Researchers hope that the genes of a glowing squid can illuminate how animals evolved organs for beneficial bacteria.