Almost all primates today, including people, give birth to usually just one baby. But our most recent common ancestor, which occupied North America about 60 million years ago, likely saw twins as ...

Fish don’t exist. In her novel “Why Fish Don’t Exist,” Lulu Miller points out that a true “fish” clade containing an ancestor ...

The first members of the human lineage lack many features that distinguish us from other primates. Although it has been a difficult quest, we are closer than ever to knowing the mother of us all.

We're getting close to your ultimate primate grandparents. But first, meet one of your most primordial ancestors, who may have looked like this mole-sized critter. We've now arrived at one of your ...

Male chimpanzee embracing and body kissing his ... that using sex for social purposes was already present in the last common ancestor they share with humans, dating back over six million years.

All primate brains, including those of humans ... which inherited these genes from a common ancestor, represented by transitional fish like Tiktaalik. This means some of the genes that fashion ...

Complete human, chimpanzee, bonobo, gorilla, and orangutan genomes have provided us a window into understanding the complex speciation process of these species' common ancestor. Analyses of these ...