Here’s a list of useless facts that are really interesting.

A fact is something believed to exist or to have occurred, about which there are ample evidence and knowledge. For instance, “Mars is a planet” is an astronomical fact, and a linguistic factuality is “the word alien contains three vowels”. Generally, facts are unconvincing.

There are cultural facts, historical facts, scientific facts and then, there are some irrelevant facts — a kind of knowledge that is of no significant use in your everyday life. Yet some of them are worth knowing. You can share it with friends and show off your uncommon knowledge. Below you will find some rather useless yet interesting facts and figures that might surprise you.

Useless Facts That Are Really Interesting

1. Cats Can’t Taste Sweetness

Felidae (colloquially known as cats) lacks the sweetness receptor, unlike other mammals. While humans have about 9,000 taste buds on their tongues, cats have just 470. All the species of cats, including tigers and lions, lack 247 base pairs of amino acids which make up the gene Tas1r2. Hence, they can’t taste sweet the way we do.

2. Small fragments of metals on your jeans play a significant role

If you think all those little metal studs which are called Rivets at the corner of your jeans pockets are useless, then you are completely mistaken. They are placed on certain areas to add extra support whereby movement or strain, denim is most likely to be pulled apart.

3. On the dominant hand, fingernails grow faster

Human fingernails grow at an average monthly rate of 3.47 millimetres. Studies suggest that the nails grow faster on your left hand if you are left-handed, and on your right hand if you are right-handed. They grow rapidly on your larger finger, too.

4. Toenails grow significantly slower than fingernails

Toenails grow even slower, at an average rate of 1.62 millimetres per month. If you end up losing one, it can take up to 18 months to fully grow back, which is three times as long as it takes your fingernails to increase.

5. Initially, trailers were shown after the movie

In the 1920s, trailers were shown at the end of the feature film (which is why they’re called trailers). These were the days when people went to the cinema and watched whatever they were showing, whether they were cartoons, news reports, or feature-length cinema. In the 1930s, the theatre owners noticed that many audiences were leaving right after the film, so they changed their practice and began showing trailers before the feature film. The name ‘trailer’ was stuck, however.

6. Apple seeds are toxic (when consumed in large amounts)

Although eating apples can have many health benefits, the tiny black seeds hidden in its heart have a completely different story. They contain a chemical called amygdalin, which releases cyanide when it gets expose to human digestive enzymes. Cyanide is poisonous, which is why you should spit out the seeds. The same applies to cherry, peach, and apricot seeds.

7. Cubic Inch Of Human Bone Is Four Times Stronger Than Concrete

Human bones are composed of collagen and calcium. Collagen is a protein that provides a strong structure, and calcium phosphate is the mineral responsible for strength and structure sharing. Hypothetically, a cubic inch of bone will hold a load of 8,626 kilograms (19,017pounds)—about the weight of two fully grown Asian elephants.

8. Electronic Dance Music (EDM) Reduces the desire of mosquitoes to bite

In 2019, researchers experimented to determine how EDM affects the blood supply and mating activity of the yellow fever mosquito called Aedes aegypti. They find that playing loud music (with very high and very low frequencies and continually increasing pitch) decreases the host attack and the effectiveness of the dengue vector Aedes aegypti.

9. Dolphins call each other by their name

Researchers have found that dolphins use a unique whistle to recognise each other (in the same way human uses names). More precisely, dolphin recognition is encrypted in the frequency modulation of their signature whistles. Every individual develops its modulation pattern early in life.

10. The Closest Living Relatives of the T-Rex Are Chickens And Ostriches

Dinosaurs were thought to be giant lizard-like creatures that wandered the Earth for millions of years. Nevertheless, genetic experiments have indicated that Tyrannosaurus Rex has more in common with birds such as chicken and ostrich.

11. The Crocodiles Can’t Stick Their Tongue Out

Like other species, the tongue of crocodiles has no part to play in eating. They have a membrane that keeps their tongue in place on the top of their mouth. Because they spend much of their time underwater, the tongue helps hold the throat closed, shielding the reptile’s airway.

12. Snails can sleep for three years.

The mean lifespan of the snail is 15 years, and it needs moisture to survive. If the environment doesn’t fit together, snails will change to hibernation or estivation to escape harsh climate conditions. Snails will sleep for as long as three years, during which they discharge mucus over their bodies to shield themselves from hot, dry weather.

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