Liquid lakes close to moon's skin
By JENNIFER CARPENTER - BBC SCIENCE & ENVIRONMENT
Added: Wed, 16 Nov 2011 19:48:36 UTC
Scientists have found the best evidence yet for water just beneath the surface of Jupiter's icy moon, Europa.
Analysis of the moon's surface suggests plumes of warmer water well up beneath its icy shell, melting and fracturing the outer layers.
The results, published in the journal Nature, predict that small lakes exist only 3km below the crust.
Any liquid water could represent a potential habitat for life.
Europa's icy shell was caught close up by Voyager 2 in 1979
From models of magnetic forces, and images of its surface, scientists have long suspected that a giant ocean, roughly 160km (100 miles) deep, lies somewhere between 10-30km beneath the ice crust.
Many astrobiologists have dreamed of following in the footsteps of Arthur C Clarke's fictional character David Bowman, who, in the novel Odyssey Two, discovers aquatic life-forms in the deep Europan sea.
But punching holes through the moon's thick, icy outer layers has always seemed untenable.
The discovery of shallow liquid water by an American team makes a space mission to recover water from the moon much more plausible.
Dave Mosher - National Geographic Comments
The sun is the roundest natural object ever precisely measured, astronomers say.
Geraint Jones - The Guardian Comments
Scientists who encoded the book say it could soon be cheaper to store information in DNA than in conventional digital devices
Ed Yong - Nature News Comments
Under the supervision of guards and graduate students, a small group of prisoners is breeding the beautiful orange-and-white insects in a greenhouse outside the prison. They have even carried out research to show what plants the butterfly prefers to lay its eggs on.
- - Scientific American Comments
Teachers, scientists and policymakers have drafted ambitious new education standards. All 50 states should adopt them
John Roach - NBC News Comments
An artificial “brain” built by a 17-year-old whiz kid from Florida is able to accurately assess tissue samples for signs of breast cancer, providing more confidence to a minimally invasive procedure.