Add Yahoo as a preferred source to see more of our stories on Google. Scientists now recognize more than a dozen species in the Homo genus. So what, exactly, was the first human species? The answer, ...

Early, ancestral members of the human lineage may have left Africa earlier than widely thought, a new study of fossil teeth suggests. Modern humans, Homo sapiens, are the only living member of the ...

It’s considered to be one of the most decisive steps in human evolution. Now, scientists believe they have pinpointed when our ancestors made the transition from walking on all fours to standing on ...