Cats recognise the voice of their owner, but never evolved to care.
22
The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
2
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492
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
The seahorse is the only fish to have a neck.
12
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
20