Electr0-Retinogram
Patients had to put that device on their face to measure the electric potential of their retina’s.
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The Most Bizarre Medical Tools from Back in the Day
The More You Know
- The largest volcano in the solar system is three times taller than Mount Everest.
- Commercial flights were allowed to fly any course to their destination and would often detour over points of interest. This ended in 1956 when two planes crashed mid-flight over the Grand Canyon.
- Honey is essentially bee vomit.
- A blue whale's tongue weighs as much as an elephant.