Exploring Earth From Space: Valentine Island, Australia

Birds can 'read' the Earth's magnetic signature well enough to get back on course

Apophis, the most intimidating asteroid around, is coming in for a visit. (It's not going to hit us). The space rock is wider than three football fields, and at one point, scientists estimated it had about a 3 percent chance of hitting Earth during an upcoming close pass in 2029.

A Geologist’s Dream: A Short Journey to the Center of the Earth