A recently discovered comet will make an uncomfortably-close planetary flyby next year -- but this time it's not Earth that's in the cosmic crosshairs. ->
If a new theory is right, pieces of a comet that struck Earth 13,000 years ago might be coming around for another pass.
Large asteroid impacts on Earth could send seismic shock waves deep into the planet, causing super volcanic eruptions that helped wipe out the dinosaurs.
Crater formation is a a mysterious science, and one we won't get a good handle on until man returns to the pripristine craters of thelunar landscape.
Back-up species play a critical role in keeping populations from crashing.
A new geologic map of Schrodinger Basin on the moon gives a unique glimpse of Luna's distant past.
New evidence points to a massive asteroid or comet smashed into the planet some 12,900 years ago during a period called the Younger Dryas.
A giant impact dome was discovered under the Timor Sea. This is one of many impacts that pummeled the planet around 35 million years ago, possibly cooling it enough to spur the formation of ice sheets on Antarctica.
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