Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
Denmark has twice as many pigs as there are people.
66
One in three dog owners say they have talked to their pets on the phone.
427
Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6
There was a bear called Wojtek who was adopted by Polish soldiers during WW2. It carried ammunition, wrestled with soldiers, and drank beer.
40
The reindeer is the only mammal that can see UV light.
17
Crows living in some urban areas drop nuts into traffic to let the passing cars crush them, then they wait for the red lights to stop the traffic so they can grab and eat it.
17