Live in the Northern Hemisphere? If so, May 2021 presents the year's best month for spotting the planet Mercury in the evening sky.

Check out the videos in this post to see the hypnotic pulse of swimming jellyfish. Their gentle movement belies a complex flow of water that make these creatures highly energy-efficient swimmers.

Within hours of each other, one rocket left the Earth on April 28, 2021, and one cargo space ship returned on April 29 - via a planned destruction during re-entry - after having been attached to the International Space Station for a year.

In 2018, a small asteroid crashed into Earth, and scientists recovered pieces of it in a Botswana game reserve. Now the scientists have determined the space rock's origin: Vesta, in the asteroid belt.

Every year millions of tons of dust from the Sahara Desert are swirled up into the atmosphere and carried across the Atlantic. Research suggests that, as the climate changes, Saharan dust transport will decrease.

Color image of the Martian surface, captured by the Ingenuity Mars helicopter.

Astronomers have managed to detect very long wavelength radio emission from a well-studied, repeating fast radio burst, called FRB 20180916B. What's more, the longer wavelengths arrive 3 days after the shorter wavelength counterpart of the signal! Why?

New research suggests that loss of water on land through ice melting and human-caused factors is changing the movement of Earth's North and South Poles.

The first of 2 spring supermoons in 2021 took place on April 26 or 27 (depending on your location on Earth). We received many wonderful submissions from you, our readers. Here's a gallery of some favorites. Thanks to all who submitted!

NASA has released a cool new visualization showing two massive black holes orbiting each other in a stunning display of light. The intense gravity and other phenomena all play a part in producing this mesmerizing display. Watch here.