The Shaker woman who reinvented the circular saw

Even more remarkably, “Mother Ann’s” loyal followers would go on to invent devices you may have in your home right now, from ...

80 million trees were wiped out in seconds in Siberia after a space rock explosion more powerful than the Hiroshima bomb, but scientists never found a crater

An explosion powerful enough to destroy millions of trees should have left behind a giant crater. Instead, when scientists ...