The moon has come a long way since Galileo first peered at it through a telescope. Unmanned probes have circled around it and landed on its surface. Twelve American astronauts have walked on it. And lunar rocks and soil have been hauled back from it.
One of the solar system's most evocative mysteries — the origin of Saturn's rings — may be a case of cosmic murder, new research suggests. The victim: an unnamed moon of Saturn that disappeared about 4.5 billion years ago.
Anyone more than a few years old at the time can probably recall exactly where they were and what they were doing when they witnessed an iconic American moment take place on live TV — the first human voyage to the surface of the moon.
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