Necks-for-sex, or Necks-for-food? Why are giraffe necks so long?

Why has it been so hard for scientists to explain why giraffes (Giraffa camelopardalis) have such long necks? After all it has been almost 140 years since Charles Darwin proposed that competition for food among African browsers led to Read More...

Eavesdropping for food

Echolocating bats emit auditory signals with foraging that can be detected and used by other bats in the neighborhood. For example, feeding buzzes, those rapid terminal pulses emitted when prey in detected, might alert nearby bats to a potential food source. Read More...