The romantic holiday has been celebrated for centuries, but the history behind it is much darker than red roses.

Neanderthals and modern humans interbred for several millennia, shortly after the ancestors of all non-Africans moved into Eurasia, according to two new studies. Although these Homo sapiens ...

I am an academic who studies the mindset of slaveholders to understand more fully their rationale for what they do, in hopes of finding better ways to eradicate modern-day enslavement. Early ...