People aren't doodling sea monsters over blank spots on the map anymore, but that doesn't mean scientists have Earth all figured out. Plenty of geological features have yet to be discovered and understood-especially where things get watery, or subterranean, or both. Case in point: a team of seismologists recently discovered what they believe is a fault line running along the the eastern shore of the Salton Sea in southern California.
Learn about your ad choices:
dovetail.prx.org/ad-choices
