Among the phenomena of the universe, nothing feels more constant than time, but here on Earth, our days are actually starting ...

The shortest day on record may be approaching as Earth spins faster than ever. Learn what’s behind the shift and how this impacts timekeeping and global systems like GPS. The post Shortest Day Looms ...

Scientists anticipate that Earth's rotation will quicken enough to create three shorter days between July and August, starting Wednesday, July 9.

Here’s what you’ll learn when you read this story: Although the Earth completes one full rotation in 86,400 seconds on average, that spin fluctuates by a millisecond or two every day. Before ...

Learn about Earth Day founder Gaylord Nelson (1916–2005) and how environmental disasters of his day inspired the creation of Earth Day in 1970. On December 7, 1972, Apollo 17 astronauts captured a now ...

July 9 was unusually short thanks to changes in how fast the Earth is spinning. But two other days this summer are expected to be even shorter.

"Zero Waste" blogger Lauren Singer has been living trash free for four years by making her own beauty and cleaning products, and buying local, organic food.