When you blow up a balloon the skin is something like 0.1mm thick, and the balloon is around 250mm across. Or a ratio of 1/2500. Our planet's crust is only 5km thick on the ocean floor, and the planet is about 13,000km - or a ratio of 1/2500. Under that thin skin our planet is mostly liquid. We live on a giant water balloon!
Scientists think the moon was formed when another giant water balloon hit this one, and a bit splashed off. Somebody very very big was having a party in those early days, and I'm glad it's over now.
I don't know about you, but I won't be doing much digging in the garden for a while, just in case I go too far and burst the ground. Or if I do have to dig I'm going to hold my breath first and tie myself to the shed just in case.
No comments:
Post a Comment