REM stages and one REM stage. Ideally, you repeatedly cycle through each stage. Learn how long each stage lasts.

Photographer extraordinaire Don Pettit is about to return to Earth following a seven-month stay aboard the space station. Take a moment to enjoy his best work.

Over 4.6 billion years ago, Earth took shape from a spinning cloud of dust and gas surrounding the young sun. Tiny particles ...

Common Sense is dedicated to improving the lives of kids and families by providing the trustworthy information, education, and independent voice they need to thrive.

Four of Earth’s neighbors are about to appear in a planetary alignment. Those four planets — Mercury, Venus, Neptune and ...

Chinese researchers analyzed the first-ever soil samples returned from the far side of the moon, but further samples will be ...

The next full moon is at 12:56 pm EST on Monday, May 12 and is known as the Flower Moon. Here is a look at all the full moons ...

HOUSTON, Texas ( KIAH ) — Each April, Earth crosses a trail of ancient dust in space, triggering a quiet but beautiful ...

April’s planetary parade has fewer planets. Only four will line up: Venus, Saturn, Mercury and Neptune. April's parade of ...

Skywatchers worldwide are in for a charming cosmic display before the sun rises next week as three celestial bodies will ...

Despite decades of searching for this signal, astronomers have yet to find it. The problem is that our Earth is too noisy, making it nearly impossible to capture this whisper. The solution is to go to ...