Previously, previously, previously, previously.
You don't really want to be behind a hippo. They use their tails to propel their dung far and wide to mark their territory.
You don't want to be in the same cage as a hippo. They one of the more aggressive animals out there. Something like one hippo attack every day. On that alone I'm going to claim 'shop.
The simmering resentment is palpable.
Unfortunately, the most successful prototypical Mars rovers presented certain insurmountable logistical challenges.
Baby Hippo Pulls Carriage
This is not an adult male hippo; they are the dangerous ones. This (believe it or not) is a "baby" or "young" hippo.