Scientists may have solved why the length of Earth’s day changes by a few milliseconds over decades. Subtle shifts in the ...

The fall equinox is Tuesday, when light and darkness split the day evenly. It marks the start of astronomical fall in the Northern Hemisphere and spring in the Southern Hemisphere.

A "potentially hazardous" asteroid skimmed past Earth at 12:27 am ET on December 4 (10:57 am IST). The huge space rock, about the size of a football stadium, reached a minimum distance of 2.2 million ...

An artistic rendering of cloud-covered Venus. Image by Zelch Csaba via Pexels. Venus keeps time in a way that seems almost designed to confuse. The planet takes about 243 Earth days to turn once ...

Where Spielberg's visions once seemed to be leading the culture, now he's following decades of lore and mythology. The UAP files show a lot of things we’ve seen before — in grainy U.S. military ...

Since February 1998 – when it surpassed the previous record-holder, NASA’s outer-planet explorer Pioneer 10 – Voyager 1 has been the farthest human-made object in existence. Even now, more than 48 ...

World Earth Day, celebrated every year on April 22, is a global reminder that our planet needs attention, care, and action. The date was first marked in 1970, when growing concerns about pollution, ...

Earth Day is celebrated annually on April 22. The theme for Earth Day 2026 is "Our power, our planet," continuing the theme from 2025. Florida has numerous Earth Day events this weekend, including ...

All products featured here are independently selected by our editors and writers. If you buy something through links on our site, Mashable may earn an affiliate commission. Credit: Blueland / Reel / ...

Earth Day began as a way to raise awareness for the health of our planet. More than 50 years after the first Earth Day, the state of the climate is more vulnerable than ever. Yet, individuals, ...

Earth Day is celebrated annually on April 22 and is not a federal holiday. The 2026 Earth Day theme is "Our Power, Our Planet," focusing on renewable energy. The first Earth Day was held in 1970 ...

Millions of people around the world will pause Wednesday, at least for a moment, to mark Earth Day. It's an annual event founded by people who hoped to stir activism to clean up and preserve a planet ...