Earth
Abiogenesis
[/caption] How did life on Earth arise? Scientific efforts to answer that question are called abiogenesis. More formally, abiogenesis is…
Earth’s Circumference
The Earth's circumference - the distance around the equator - is 40,075 kilometers around. That's sounded nice and simple, but…
Magnetic North Pole
[/caption] The Earth has a magnetic field, known as the magnetosphere, that protects our planet from the particles of the…
Satellite Map of the World
There's no better way to appreciate the planet you live on than to have a great big picture of it…
Albedo Effect
Astronomers define the reflectivity of an object in space using a term called albedo. This is the amount of electromagnetic…
Atmosphere Layers
[/caption] Seen from space, the Earth's atmosphere is incredibly thin, like a slight haze around the planet. But the atmosphere…
Super Earths
[/caption] The holy grail in the search for extrasolar planets will be the discovery of Earthlike planets orbiting other stars.…
Destruction of Earth
[/caption] Want to destroy the Earth? It's harder than it sounds. That's because the Earth is held together by the…
What Causes Tides?
Tides refer to the rise and fall of our oceans’ surfaces. It is caused by the attractive forces of the…