Five hundred years ago, the Aztec civilization in today’s Mexico believed that the sun and all its power was sustained by blood from human sacrifice. Today, we know that the sun, along with all other ...

Everyday Health’s team of board-certified physicians and health professionals contribute to the creation and review of content, ensuring that the information is useful, up to date, and accurate. Susan ...

Make sense of the day’s news and ideas. Times journalists guide you through what’s happening — and why it matters. Make sense of the day’s news and ideas. Times journalists guide you through what’s ...