To understand why kangaroos hop -- a rarity among animals -- researchers have studied the musky rat-kangaroo (Hypsiprymnodon moschatus), a diminutive marsupial that weighs only 500 grams but is the ...

They believe the answer may lie with the small musky rat-kangaroo, a bush-dwelling marsupial weighing about the same as a loaf of bread. Musky rat-kangaroos are a distant ancestor of the larger ...