When a caterpillar hatches from its egg, it spends the first few weeks of its life eating as much as it physically can. Then, it hangs itself upside down from a leaf or stem and sheds its outer skin ...

Every spring, I see spiny bugs that look like tiny alligators. They spend all day chomping up other insects outside my window. I asked my friend Rich Zack about them. He’s an insect scientist at ...