If you've ever had to dig a hole and then fill it back in, you may have noticed a mysterious thing: there was always a little dirt left over. Why?
Clouds weigh several tons but stay airy by distributing their weight over a large area.
Salt absorbs water vapor from surrounding air and sometimes partially liquifies and clumps together in the process.
Lips are made of very sensitive tissue and, because we use our mouths constantly, are over-exposed to harsh environmental factors.
It may sound paradoxical, but warm spells and flurries often go hand in hand.
When looking at a picture of the sun, how could you tell whether or not it's rising or setting?
If you have a runny nose and a fever, you'll need to drink more to replace those lost fluids. But why?
We know that some nasty things are happening to the lungs, but why does the smoke change color?
Global climate is an incredibly complex system that scientists are still trying to figure out.
The consequences of global warming seem daunting for humans... but, what about cockroaches?