What is the slowest mammal on earth?
I'm sure its a three-toed sloth. They only come down from a tree once a week. Scientists who study sloths are always falling asleep - I'm not joking! Imagine watching a furry green thing do nothing for hours on end? The first thing a scientist who first saw the sloth said was: "I have never seen an uglier or more useless creature." But still their faces are quite cute I have to admit.
the sloth it hangs around in trees all day it would take the sloth half a day to walk 1 mile. hippopotamus is the slowest land mammal Edit: The Hippopotamus is not the slowest land mammal, it can run up to 20 mph on land. The three-toed sloth is the slowest, with a top speed of roughly 0.003 miles per hour. It moves so slowly it typically grows algae on it's back.