<p>Why do we celebrate Halloween? Who created this holiday? Where do pumpkins come from and why do we carve them? This week we're answering your Halloween questions with a professor of all kinds of scary and creepy things, Regina Hansen of Boston University.</p>

Why Don't Spiders Get Stuck In Their Webs?

But Why is a show led by kids. They ask the questions and we find the answers. It’s a big interesting world out there. On But Why, we tackle topics large and small, about nature, words, even the end of the world. Know a kid with a question? Record it with a smartphone. Be sure to include your kid's first name, age, and town and send the recording to questions@butwhykids.org!