Coal is compressed organic matter — it takes millions of years to form from ancient forests.

Dust storms can reduce visibility to near zero.

Water is the only common substance on Earth that naturally exists in all three states — solid, liquid, and gas — at everyday temperatures.

The total weight of all ants on Earth is roughly equal to the total weight of all humans.

A spider spins silk that is incredibly strong for its weight.

Cashews grow outside the cashew apple fruit — what looks like the nut is actually the seed.

The Sahara Desert can experience large temperature swings between day and night.

Certain plants release chemicals to deter competing vegetation.

The Amazon rainforest supports millions of species.