Earth
How Big is Earth?
[/caption] Here's a question: how big is Earth? Let's take a look at how big our planet is. First, the…
Tsunami Pictures
Tsunamis are some of the most devastating natural disasters. The recent Boxing Day Tsunami was generated by an enormous earthquake…
Pictures of Rivers
Here are some cool pictures of rivers taken by various spacecraft. Here's a picture of the Mississippi river delta. The…
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…