Among the greatest mysteries of the tropical rainforest are the pooping habits of sloths. Really. Those furry, slow-moving tree dwellers almost never descend from the safety of the tree tops—except ...

The researchers found that three-toed sloths can harbor more phoretic moths than their two-toed counterparts because of greater concentrations of inorganic nitrogen and higher algal biomass in their ...

There are some great animal mysteries on Planet Earth. Where do whale sharks give birth? How did the starfish become a star? How did this mystery circle form? One such mystery is related to one of the ...