Jupiter Moon Europa's Giant Geysers Are Missing

The huge geysers on Jupiter's icy moon Europa have gone underground. Late last year, scientists announced that NASA's Hubble Space Telescope had detected plumes of water vapor spewing about 120 miles (200 kilometers) into space from Europa's south pole in December 2012. The news was met with a great deal of excitement, as it suggested that a robotic probe may be able to sample Europa's possibly life-supporting subsurface ocean without touching down.

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