Sloths are unusual: they're the slowest-moving mammals on the planet, have the slowest metabolisms too , and do not constantly regulate their body temperature. Now, a new genetic study has uncovered clues to how these famously unhurried creatures evolved such an extreme low-energy lifestyle. An international team of researchers has conducted a comprehensive analysis of the two-toed sloth ( Choloepus didactylus ), comparing it with dozens of other mammals, including fellow xenarthrans the

Tag-uri: DNA