Earth mysteries

Earth mysteries are things that people don't fully understand about our planet, Earth. For example, many people have heard of the Bermuda Triangle-- an area in the Atlantic Ocean where strange things, like planes and ships disappearing, happen. Scientists have studied it, but still don't understand why so strange things happen there. Another Earth mystery is Stonehenge-- a big arrangement of stones in England. People don't know why it was built or by who. It's a mystery.