Mysterious Ice Caves That Stay Frozen During the Summer Although the temperatures outside climb into the high sixties, the ice caves found just a few feet below ground remain frozen solid.
Earth Is Made Up of Two Planets The violent collision that occurred nearly 4.5-billion years ago also formed the moon.
The Indian Ocean Is Our Best Bet for Drilling to the Center of the Earth Humans have traveled over 225,000 miles to the moon, but still haven’t seen 3 miles beneath our own feet.