Earth, our home planet, is a world unlike any other. The third planet from the sun, Earth is the only place in the known universe confirmed to host life. With a radius of 3,959 miles, Earth is the ...

Earth is a planet with an abundance of natural beauty. The luscious green forests, the breathtaking waterfalls, the rugged-yet-serene mountains—there's so much to admire and explore on our planet.

but since our planet was formed around 4.6 billion years ago, the length of a day has been gradually growing. A day is the time period of a full rotation of the Earth with respect to the Sun.

Print this free Earth Day scavenger hunt and enjoy these other fun Earth Day activities for your family. Let us know which ...

If you can name it, you're a true Earth Day fan. Otherwise, read on to find out what it is along with other fun facts about the planet and this annual celebration of Mother Earth. There's more ...

A collection of down-to-Earth facts about our planet and its place in the solar system. This collection introduces the Sun as the main source of light and heat on Earth. It explains that the Earth ...

Billions of years ago, the fourth planet from the sun could have been mistaken for Earth’s smaller twin, with liquid water on its surface—and maybe even life. Now, the world is a cold ...

Today, Earth Hour is one of the world’s largest grassroots environmental movements, which takes place every year with the same aim as back in 2007—to unite the world in support of people and the ...

Pssst: it's Earth Hour ... commitment to the planet. Fun fact: more than 385,000 people across 175 countries will be taking part. And in the meantime - keep reading for ten facts you didn't ...