Spacecraft lands on comet

Hundreds of millions of miles from Earth, a European spacecraft made history Wednesday by successfully landing on the icy, dusty surface of a speeding comet — an audacious first designed to answer big questions about the universe.

The landing on comet 67P/Churyumov-Gerasimenko required immense precision, as even the slightest error could have resulted in cosmic calamity.

Indications were that the spacecraft touched down almost perfectly, save for an unplanned bounce, said Stephan Ulamec, head of the lander operation. (European Space Agency/Getty Images/AP)

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