And there are plenty of interesting Earth Day facts to learn! But, first, a little background. Earth Day falls on April 22 ...

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 ...

And more astonishing facts about how the Earth changes in 24 hours. Emma Segal ...

It's commonly known that a day on Earth lasts for 24 hours, but the truth behind what determines the length of a day is actually a bit complicated.