How do you know if you're eating the proteins your body truly needs? Here's the difference between essential and non-essential amino acids.

The field of psychology is seeing more robust research techniques than before, with focus on positive psychology. What led to these changes?

Intelligence was traditionally considered to be fixed. But the latest research on brain plasticity challenges this notion.

Haiti became the world's first Black republic after a revolution. Now, after an assassination, it's more fragile than ever.

For centuries, the bubonic plague was thought to be the prime cause of the Black Death. What do the modern studies say about this?