Ripley's Believe It or Not by Ripley’s Believe It or Not! for April 03, 2014
Transcript:
Ripley's Believe It or Not! HORSE POWER! Ferries powered by horses on treadmills were used on the lakes and rivers of Northeastern America in the early 1800s. RADIOACTIVE MATERIAL was added to German toothpaste in the 1910s with the claim that it would make teeth whiter. The Moken People of Southeast Asia, who have deep-dived for food for centuries, have underwater vision twice as sharp as Europeans.
Now about a century later, I’m sure toothpastes have some other material to help whiten your pearly whites.