The Amazon rainforest stretches for millions of kilometers, hiding ancient tribes, animals and maybe something else. What if ...

Think ancient civilizations were primitive? The evidence suggests otherwise. From computers that tracked celestial events to concrete that grows stronger with age, our ancestors created technologies ...

At its peak, the ancient Indus River Valley civilization featured gridded streets, multistory brick homes, flush toilets and bustling shops. Its people traded gold, precious stones and items such as ...