The squee factor may be strong with this one, but a fluffy rover has given scientists the ability to make some serious finds as well.
A problem called "the observer effect" has plagued scientists for centuries. Simply put, using a tool to measure something changes the very thing being measured, to varying effect. (Nutritionists used to determine calories in food by setting the morsel ablaze inside the wonderfully-named bomb calorimeter.)
Biologists have to deal with their own version of the observer effect. Checking to see if whales are healthy gets tough when an approaching boat stresses out the marine mammals. The solution, then, is to become as unintrusive as possible. For whale scientists, that means tiny flying drones.
For a group of penguin researchers, it means this guy: