Most animals, including humans, carry an internal lunar clock, tuned to the 29.5-day rhythm of the Moon. It guides sleep, ...

The Geminid meteor shower, considered one of the best of the year, is about to hit its 2025 peak in mid-December. Here's what to know.

Let’s take a mental trip back to seventh-grade health class. When you got to the unit on menstruation, you probably learned that people with uteruses typically get their periods once a month or so—but ...