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Following is a summary of current science news briefs.
Dung beetles look to the stars
JOHANNESBURG (Reuters) - A species of South African dung beetle has been shown to use the Milky Way to navigate, making it the only known animal that turns to the galactic spray of stars across the night sky for direction. Researchers have known for several years that the inch-long insects use the sun or moon as fixed points to ensure they keep rolling dung balls in a straight line - the quickest way of getting away from other beetles at the dung heap.
Andean glaciers melting at "unprecedented" rates: study
LIMA (Reuters) - Climate change has shrunk Andean glaciers between 30 and 50 percent since the 1970s and could melt many of them away altogether in coming years, according to a study published on Tuesday in the journal The Cryosphere. Andean glaciers, a vital source of fresh water for tens of millions of South Americans, are retreating at their fastest rates in more than 300 years, according to the most comprehensive review of Andean ice loss so far.