The Basenji dog is the only dog that is not able to bark.
4
When cats are happy, they may squeeze their eyes shut.
10
There's a rare breed of pig that looks like a sheep.
14
Termites are being researched as a possible renewable energy source as they can produce up to 2 litres of hydrogen from ingesting a single sheet of paper, making them one of the planet’s most efficient bioreactors.
24
The seahorse is the only fish to have a neck.
12
Dogs sometimes fake being sick to get attention.
26