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The first copy of the Oxford English dictionary is missing the word ‘dictionary’. The first copy was made in the late 1800s. James A. H. Murray was so focused on collecting as many words as possible that he forgot to include the word ‘dictionary’.

Black Holes aren’t actually holes, but are actually highly dense objects with massive gravitational pull. Some of these black holes spin up to 84% the speed of light. Some scientists theorize that if the black holes were to spin any faster they would loose their heavy gravitational pull and fall apart.

During their chief breeding season during the warmer months of the year, female cockroaches smell like pineapple.

Due to the inclusion of certain metal isotopes in its construction, the standard trombone is actually radioactive for a short period of time.

MRI scans of cat brains have revealed that they see humans as a prey species. The same area of the brain that lights up when a cat sees a mouse lights up when they see a human.

On average, three people are injured every time an audience gives a standing ovation. 

The first sunglasses were actually animal skin scraped so thin that it became transparent. These sunglasses were made by early tribes in the arctic in order to protect their eyes from snow blindness. The next incarnation of these sunglasses were ones often made out of bone or driftwood with a small slit in the middle.

There is a pattern on the inside of your upper eyelid that is as unique as your fingerprint. This pattern is also much like the unique retinal patterns of the eye itself.

The same molecule that makes chicken taste like chicken can also be found in ground up oyster shells.  The molecule is an alkanone which is a compound derived from a lipid precursor.

Buzz Aldrin left a pen on the moon after the first visit. Eugene Cernan, the last moon walker, found it. It still worked.

Guinea pigs are unable to smell peppermint. They use their sense of smell to scope out food and to recognize people and other animals. However, due to the lack of a class I olfactory receptor the guinea pig cannot sniff out peppermint. Peppermint is safe to eat for guinea pigs, but they can’t smell it.

The Ancient Greeks used to use jellified red wine as a lubricant. They made the lubricant in a similar fashion to how we make jello today. They used small amounts of gelatin made from animal bones to give the wine a thicker consistency.