David Attenborough voice “When threatened, the M.D.s will huddle for safety in an attempt to look bigger and more dangerous. To make their escape they will identify the youngest in the heard and separate them from the group to distract their predators as the rest escape. It’s a cruel but effective strategy, ensuring the heard will live on to replenish their numbers. They understand, without hesitation, that survival in the unforgiving wild sometimes requires sacrifice.”