Brr! But in sunlight near Earth, temperatures can swing to a boiling 250 degrees Fahrenheit. That's why astronauts wear reflective white spacesuits. Unimpeded, light can move at 299,792,458 meters ...

Prehistoric time line, geologic time scale, photos, facts, maps, and more from National Geographic. Humans have walked the Earth for 190,000 years, a mere blip in Earth's 4.5-billion-year history.

It seems like wasted real estate,” Kane says. So Kane dropped a fictional super-Earth in that gap to see what would happen. The results are published in a recent issue of the Planetary Science ...

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 ...

Rainforests in these regions cover just 2% of Earth's total surface area and yet house half of the world's plant and animal species. Deforestation is the clearing of forests. Most deforestation ...