The main difference between mice and rats to the human eye is size. Rats can be at least double the size and have much longer tails. Their DNA is different and even their chromosome numbers.

Mice can squeeze into holes the same size as a pencil, about 6 mm, by flattening their bodies.

Mice can sing songs ultrasonically to their mates, which humans cannot hear.

Mice cannot see very well; they rely on their whiskers, smell, and hearing.

A single mouse can eat 15 to 20 times a day and produce 40 to 100 droppings per day, or 36,000 per year.

Mice are unable to vomit.

They can reproduce quickly, with females having up to 10 litters a year.

Their teeth never stop growing, at about 0.3 mm per day.

Mice build nests near food, and a group is sometimes called a mischief.

Mice can walk on narrow surfaces like wires because of their tail balance.

Mice typically live just five months in the wild, but one to three years in captivity.

Seventy four percent of animal tests involve mice.

The first cloned mouse was created in 1998. HIV treatment immunology was further advanced, and all such works have contributed to 30 Nobel Prizes.

A single mouse could carry 200 different pathogens.

Mice can help other mice that need a mouse version of CPR by pulling their tongues, but they sometimes do not do this favor for stranger mice.

Sometimes mice invade homes to seek warmth rather than food, mainly during the winter months.

Wheels placed outside in the woods have had mice run on them, proving it is fun for them and not just something they do in bored caged environments.

Three Blind Mice is a children’s rhyme, but the inspiration may have originated from three Protestants punished during the reign of Queen Mary Tudor in England.