A blue whale's aorta (the main blood vessel) is large enough for a human to crawl through.
52
Nervous dogs wag their tails to the left, and happy dogs to the right (from the dog’s point of view) – and fellow canines pick up on this lop-sided tail language.
10
In just about every species of mammal, the female lives longer than the male.
43
Ants make up 1/10 of the total world animal tissue. The total biomass of all the ants on Earth is about equal to the total biomass of all the people.
85
The 'vintage date' on a bottle of wine indicates the year the grapes were picked, not the year of bottling!
38
Bluebirds cannot see the color blue.
40
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
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