SciShow

Weird Pregnancy Tests (2013x94)

Ημερομηνία προβολής: Ιουν 20, 2013

Hank takes us on a trip through the history of pregnancy tests through the ages, from ancient Egypt to the first home pregnancy tests of the 1970s. It's generally not a very pretty story, but it should help make us very grateful for the modern conveniences we have today.