Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
The seahorse is the only fish to have a neck.
12
Queen ants have one of the longest life-spans of any known insect - typically up to 30 years. Western harvester ant queens can live up to 40 years!
2
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Sharks have been on the planet longer than trees.
14