The horizon line can be a tricky thing to measure...
For billions of years, the Earth's only natural satellite has been bombarded with asteroids. Surely, it's been the target of space rocks in the past.
There are a few well known warning signs, such as earthquakes in the vicinity of a known volcano. And, of course, smoke rising from a volcano.
Would food fly off a plate in space? Would astronauts have digestive problems? Learn the science behind space food!
More often than not, the wind dies down at night after a blustery day. Where does the wind go? Why are nights generally more calm than days?
Does the wind have anything to do with the rotation of the earth?
Watch our nearest planetary neighbor 'transit' across the sun on Tuesday. You're going to want to some good eye protection.
If you've ever glanced skyward, you've probably noticed the sheer numbers of stars. Some are tiny, barely visible points. Others radiate strong white light.
There's an interesting effect we can sometimes see regarding the moon. It happens when only a tiny sliver is visible shining on one side.
Why is the earth round? Why isn't it a cube or a pyramid?