The average housefly weighs 10 to 15 millionths of a pound.
33
A shrimp's heart is in its head.
32
7,000 new insect species are discovered every year.
30
A group of kangaroos is called a mob.
28
Cockroaches can live for 9 days after their head has been cut off.
140
Over 10,000 birds a year die from smashing into windows.
47
Goats do not have upper front teeth.
27
