What's the chemical formula for a human being?

Why do boomerangs come back?

Why do flying fish fly?

Do the living really outnumber the dead?

Why does lightning fork?

Why does the end of a whip crack?

Everyone has at one time or another thought up odd questions like these, questions that are strange, intriguing, maybe even impossible to answer. Making your morning omelet, perhaps you've wondered why most eggs are egg shaped. Or maybe, the last time you walked on the beach, you felt compelled to ask why the sea is salty. Watching Polly sit on her perch, have you ever marveled at how she stays there -- even when she's asleep? Well, the readers of New Scientist's wildly popular, long-running column "The Last Word" thought of these questions, too, and weren't afraid to ask them.