(Photo credit: http://nationalzoo.si.edu/Animals/PhotoGallery/Primates/7.cfm )
Scientists have long wondered why early primates inhabited forest canopies, given that climbing appears to consume more energy than walking. However Duke University resea [...]

Link: Genetics and Health

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(Photo, credit:, http://nationalzoo.si.edu/Animals/PhotoGallery/Primates/7.cfm )
Scientists, have, long, wondered, early, primates, inhabited, forest, canopies,, given, that, climbing, appears, consume, more, energy, than, walking., However, Duke, University, researchers, studying, primates, walking, treadmills, found, that, there, energy, consumption, difference, small, primates.
This, suggests, that ancestors, humans,, apes, monkeys, have, taken, trees, [...], [...]