Fact or Fiction? #1

While there is a range of different fleshed watermelons including red, yellow and green, unfortunately blue and purple watermelons are a hoax. Millions of people have been tricked into thinking these perfectly Photo-shopped watermelons really do exist.
Taken from: https://www.whataboutwatermelon.com/index.php/2018/05/purple-blue-watermelons-really-exist/

Lightning storms turn methane into soot which hardens into chunks of graphite and then diamond as it falls.
Taken from: https://nypost.com/2013/10/15/its-raining-diamonds-on-saturn-and-jupiter/

Carrots do contain carotene, a natural compound that is needed to construct the light-receiving apparatus in the retina, but they won’t help you see in the dark.
Taken from: https://www.telegraph.co.uk/news/2016/04/22/the-ultimate-true-or-false-quiz-scientific-fact-or-fiction/

Pirates didn’t wear patches to cover a missing eye; they actually wore one to keep one eye adjusted to darkness when going below deck.
Taken from: https://www.telegraph.co.uk/news/2016/04/22/the-ultimate-true-or-false-quiz-scientific-fact-or-fiction/

Koalas do have human-like fingerprints. In fact, even forensic detectives would have a hard time distinguishing between koala fingerprints and human ones.
Taken from: https://www.livescience.com/14007-koalas-human-fingerprints.html

By the time a paper is folded 20 times, the folded paper is more than 10 kilometers high, which surpasses Mt. Everest. 41 foldings will get you slightly more than halfway to the Moon, so that means that 42 foldings is all it takes!
Taken from: https://scienceblogs.com/startswithabang/2009/08/31/paper-folding-to-the-moon

Adding salt does the very opposite of making water boil faster. It actually makes it take longer for the water to boil.
Taken from: https://www.rd.com/culture/false-facts-everyone-believes/

It is quite a common belief that Italian astronomer Galileo Galilei invented the telescope but this is not strictly true. The earliest workings towards the design of the refracting telescope were made by German-Dutch lensmaker Hans Lippershey in 1608.
Taken from: https://www.spaceanswers.com/astronomy/did-galileo-invent-the-telescope

Apollo 16 astronaut Charles Duke didn't just leave footprints when he visited the lunar surface, he also left a photograph of his family.
Taken from: https://www.dailymail.co.uk/news/article-2277469/The-family-portrait-MOON-40-years-Astronaut-left-picture-wife-kids-1972.html

The sun may be older than the earth, but the water we drink is older than the sun.
Taken from: http://www.cracked.com/pictofacts-621-22-insane-sounding-facts-that-are-absolutely-true/

The Eiffel Tower is actually 15-17cm taller in the summer. When the hot summer sun beats down on it, thermal expansion causes the metal to grow.
Taken from: https://curiosity.com/topics/the-eiffel-tower-is-taller-in-summer/

Actually, they grow on massive herbs that just resemble trees.
Taken from: https://www.rd.com/culture/false-facts-everyone-believes/

When we see cats in popular culture, they’re often depicted next to a saucer of milk. However, what many of us may not know is that cats generally do not digest milk very well. Their digestive system cannot process dairy foods, and the result can be digestive upset with diarrhea.
Taken from: https://pets.webmd.com/cats/ss/slideshow-foods-your-cat-should-never-eat; https://www.fussiecat.com/?p=1843&lang=en

Though your stomach can't break down a piece of gum the same way it breaks down other food, your digestive system can move it along through normal intestinal activity.
Taken from: https://kidshealth.org/en/kids/swallowed-gum.html

Bulls, along with all other cattle, are color-blind to red. Thus, the bull is likely irritated not by the muleta's color, but by the cape's movement as the matador whips it around.
Taken from: https://www.livescience.com/33700-bulls-charge-red.html