Sharks can't sneeze like we do, but they can do other cool tricks -- like making their stomach stick out of their mouth to get rid of unwanted stuff.
Bo, aged nine, wants to know why adults think video games are bad.
If a huge huntsman spider is sucked into a vacuum cleaner, can it crawl out later? Lucy, age eight, really, really needs to know.
Maëlle, 7, wants to know why some shells are smooth, while others are corrugated. It turns out that while corrugated shells are strong, smooth shells can move fast.
Plants on other planets are bound to be even weirder than the strangest ones we find on Earth – if they even exist.
Cats evolved in hot desert regions where there were lots of small animals to eat. So they evolved feet that are perfect for pouncing on prey, climbing, scratching and jumping from great heights.
People used to think that when they looked up at the night sky, they were seeing all of space. Then American astronomer Edwin Hubble found out something so amazing, NASA named a telescope after him.
Millie, aged 5, wants to know where money comes from. We asked an economist to explain.