Just watched a particularly good episode of QI whilst drinking beer. Three fascinating things:
- Take a (certain species of) frog; inject it with a woman’s urine; if it ovulates the woman is pregnant. Until the 1950s this was the only available pregnancy test. Truly we are in the morning of civilisation.
- Human fleas (fleas that live on humans) are almost extinct because of the invention of the vacuum cleaner. Amazing thing, civilisation.
- Boeing used to use ferrets to thread cabling through ducts on airliners. They’re still used for this purpose on projects that require retrofitting cables.
