So many humans live on Earth, it’s hard to imagine there are animals we haven’t seen for years, decades, or even millions of ...

Human beings have been at the center of ecological change on Earth for thousands of years. But as history shows, no species ...

A recent discovery at Lake Turkana in Kenya has scientists thinking there may have been two ancestral human species — or hominins — coexisting together. Thanks to a patch of wet silt that was buried ...

Debates over responsibility for past species loss generate heat but little light. Moving forward requires context, evidence ...