How Do They Know?

I recently came across some weird animal facts. What really makes them interesting is that these details are even known. I mean, who took the time and trouble (and, in some cases, put undue stress on the animals) in order to discover that:

A homing pigeon won't find its way home if a magnet is attached to its neck.

An ant always falls over on its right side when intoxicated.

If a tiny amount of liquor is placed on a scorpion, it will sting itself to death.

A pig's orgasm lasts for 30 minutes.


Then there's the more mundane facts about animals:

Elephants are the only animals that can't jump.

A crocodile can't stick out its tongue.

Butterflies taste with their feet.


I have no idea if any of these are true. After all, I found them on the Internet -- not exactly a reliable source. If animals were able, what weird human facts do you think they'd list?