Lemons are a mixed-breed fruit, a hybrid of a citron and a bitter orange.

The origins of lemons are technically uncertain, but it’s likely they were first cultivated about 3,000 years ago in northeastern India. They were introduced to Europe by the Roman Empire when it was still at its prime.

Lemon juice contains about five times more citric acid than orange juice.

The word “lemon” came into English from the French word limon, but all European languages got their word for lemon from a Persian word that generically described a citrus fruit.

Lemons are grown all over the world, but India is the world leader in production, with Mexico and China making up a large portion of the global crop as well.

Along with other citrus fruits, lemons were used by the British Navy in the 18th century to combat scurvy. At the time, they did not know the details about vitamin C but eventually realized that consuming these fruits could help prevent the disease.

Lemons are a very useful tool for humans, even if they aren’t eaten for pleasure. They have antibacterial and antiviral properties, can be a good cleaning agent, a natural bleach, an odor neutralizer, and can even help dissolve early formations of kidney stones.

The world’s heaviest lemon ever grown weighed 11 lbs.

Lemon trees can typically produce up to 1,500 lemons each year.

It’s possible to make a battery out of a lemon if the devices are small enough and do not require much electricity.

Lemon juice can also be used as a natural invisible ink.