What size of a hole can a mouse get through? If you have ingenuity, time, and tools you can find out.
Matthias Wandel of woodgears.ca takes an engineering approach to woodworking. When a mouse got into his woodshed he made a wooden gauge to find the smallest hole the mouse could squeeze through. His seven-minute video, above, became an Internet sensation.
The mouse tried many holes but gave up quickly if they were too small. What limits the mouse from squeezing through? It’s the size of his skull, not the size of his belly that stands in the way.
Near the end of the video a shrew appears. What limits the shrew?