The world is full of mysteries, and we at Popular Science strive to
do our part to help you make sense of them. What do animals dream about? Is there any way to ensure a blink-free photo? And what is the worst sound on Earth? We've covered these important bases and more to help you become
the hit of the next cocktail party and your friends' go-to expert on the
most curious parts of life. Launch the photo gallery to learn the answers to questions that have always made you scratch your head. Because sometimes
you just need to know.