Arizona is home to world record holding animals and insects. That includes this cute critter, which is the smallest of its kind. Have you ever seen it?

This mouse, which is often grey or black, is significantly smaller than most rodents. The rodent is usually between 3.5 and 4.8 inches, while the house mouse is between 4.7-7.8 inches.

However, the animal that’s arguably helped us the most in understanding both our biology and evolution more broadly is the ...

The critically endangered smoky mouse is not your average rodent. Three times larger than a house mouse, with a soft blue-grey fur and bright beady eyes, this rare and cryptic animal has been the ...

The genes were injected during the mouse’s embryonic state and created a chimera, which is the term for an animal that sports two distinct sets of DNA. Related Story Scientists Grew a Mouse ...