Their dams cause floods, and that gets them in trouble with humans. But in the right place, more water can be a big help. Their dams cause floods, and that gets them in trouble with humans. But in the ...

Add Yahoo as a preferred source to see more of our stories on Google. Dr. Sam and Nisha in Pixar's Hoppers. (Pixar) Field researchers will go to considerable lengths to study animals in the wild. In ...