Curious Kids[1] is a series for children of all ages. If you have a question you’d like an expert to answer, send it to This email address is being protected from spambots. You need JavaScript enabled to view it.[2].How was the Earth built? – Noah, age 5, Florida It isn’t easy to figure out how the Earth was built, because it happened 4½ billion years ago, and no one was there to
Curious Kids[1] is a series for children of all ages. If you have a question you’d like an expert to answer, send it to...