While the wooly musk ox may like it cold, fruit flies
definitely do not. They like it hot, or at least warm. In fact, their preferred
optimum temperature is very similar to that of humans—76 degrees F.
Scientists have known that a type of brain cell circuit
helps regulate a variety of innate and learned behavior in animals, including
their temperature preferences. What has been a mystery is whether or not this
behavior stems from a specific set of neurons (brain cells) or overlapping
sets.