A duck's quack doesn't echo, and no one knows why.
173
Catgut comes from sheep not cats.
11
The flea can jump 350 times its body length, that is like a human jumping the length of a football field.
32
The original name for the butterfly was 'flutterby'!
121
A cow gives nearly 200,000 glasses of milk in her lifetime.
33
Certain frogs (like the Wood Frog) can be frozen, thawed, and survive!
196