No matter how old you are, you’re part of the economy, but it can be tricky to understand what the... more

Fleas, lice, tapeworms and ticks - these are all examples of parasites, living organisms that live on or in a... more

How do trains work? We went to Union Station in Washington, DC to answer a whole wagonload of questions with... more

How do people whistle? How does whistling make a sound? Why does your tongue change a whistle higher or lower?... more

Are all cats afraid of water? Do wild cats bury their poop? How are the cats that live in your... more

If you could be a superhero, what would you want your superpower to be–and what would you call yourself? That’s... more

Who decides what robots look like? How do robots work and move? How are they controlled? And are robots alive?... more

Why can’t animals talk to us? Are humans the only animals that can talk? Can different species of animals communicate... more

Why do we have to poop? Why does fiber make you poop? Why is poop brown? Why does it smell... more

Why do we worry and how can we deal with it? Why do we get anxious? Where does anxiety come... more