Category Archives: News

Google’s Year of Forgetting

Google has gotten better at forgetting. A year ago, a European court ruled that Google search results in the European Union were subject to European data-protection rules. That meant that while private individuals might not be able to force a newspaper to retract an irrelevant or outdated story about them, they could ask Google to remove links to the story. Despite a slow start, the search giant has now caught up with the requests. In the meantime, Americans, Japanese, Koreans, and others around the world are proposing the adoption of similar privacy-protection policies.
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Credit: Ian Joughin, CC BY-NC-SA 3.0

Building a Better Glacial Speedometer

Greenland is the land of escaping lakes. In the summer, when soot lands on the ice sheet’s snowy surface and the Sun begins to melt the snow, bright blue lakes form on top of the ice. Just as on land, the water seeks a way down.

Sometimes, instead of carving surface channels, water trickles into the ice sheet through crevasses and vertical shafts called moulins. In the most dramatic cases, a lake can burst through a kilometer-thick ice sheet and rush to the bottom of the glacier in a forceful waterfall. There, under high pressure, water may help the glacier glide a little faster over the rock below.

Just how fast, however, is the subject of an ongoing debate. Continue reading