Vikings used the skulls of their enemies as drinking vessels.
169
English sailors were referred to as "limeys" because sailors added lime juice to their diet to combat scurvy.
69
The oldest glowing lightbulb was first switched on in 1901 and lives in fire stations in Livermore, CA. It is known as the Centennial Light.
118
Leonardo Da Vinci predicted the mass use of solar energy as long ago as 1447.
153
In the 1830s, a Greek prime minister tried to spread the potato in Greece but people weren't interested so he put armed guards in front of shipments of potatoes so people would think they were important. People then started stealing these potatoes so much that the crop spread to all of Greece.
29
In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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