Covering more than 2 million square miles in South America, the world's biggest tropical rainforest hides lots of scary secrets—and some beautiful ones too A look inside the rainforest The Amazon ...

Don't reach for a shoe the next time you find a spider in your home. Squishing some types of spiders can create even bigger ...

Like most spiders, it's the females of this species that are larger than the males. However, it is the males most responsible ...