It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217
An average cat has 1-8 kittens per litter and can have 2-3 litters per year. During her productive life, one female cat could have more than 100 kittens. A single pair of cats and their kittens can produce as many as 420,000 kittens in just 7 years.
10
In Australia, there are spiders big enough to eat snakes.
20
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
When a drone bee mates with a queen, its ejaculation is so powerful that it can even be heard by the human ear.
5
George was the world's largest dog who weighed 233 pounds, stood at 43 inches tall from paw to shoulder, and ate 180 pounds of food a month.
7
If a vampire bat goes 2 days without drinking blood, they can die. However, well fed female bats will puke up blood and share it with other bats that they like in exchange for grooming.
13
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23