You might have recognized the names of some of the Greek natural philosophers. They were individuals with quirky theories, and we have records about them. But they weren’t the only people making knowledge back in the day. Today, Hank...

The Indus Valley civilization began to decline around 2000 BC. This decline coincided with the arrival of the Aryans, nomadic warriors who spread across the fertile Indian plains. Their society, divided into three classes—farmers,...

Energy from the sun gives heat, offers a bright reprieve from the darkness of night, and serves as the base for our entire food chain. It is no wonder it plays a central role in nearly all world mythologies.