The Most Bizarre Medical Tools from Back in the Day

Pre-PET Headgear

Can you imagine having to sit in this contraption? This was an old school way to study the human brain.

Great white sharks are so scared of killer whales that they'll avoid an area for up to a year after spotting one.
A "jiffy" is an actual unit of time.
Dr. Seuss wrote Green Eggs and Ham as part of a bet.
There are 293 ways to make change for $1.