An art collector once paid $10,000 for actor James Franco's "invisible" sculpture. The piece was marketed as an "endless tank of oxygen." Yes, it's called air. We're breathing now... for free!

No, caramel and dulce de leche are not synonymous. Caramel, as we all know, is nothing more than water and sugar. Dulce de leche, on the other hand, is milk and sugar, as the name suggests (if you've practiced your Spanish).

True trivia that may break a few hearts: when the Joker first appeared in 1940, he was supposed to be a one-off event that would disappear after a few incidents. Fans were so taken with his character, and they appreciated how brutal and unpredictable he was, that he was made a regular in the Batman franchise. He's lucky he wasn't cancelled! We would never have spotted these amazing Easter Eggs in the latest Joker film if it hadn't been for the internet!

Your liver uses cholesterol to make bile acids, and bile is the only way your body can get rid of excess cholesterol.

Your body also uses cholesterol to make sex hormones, like estrogen and testosterone. If you have liver disease, you’ll have trouble absorbing fats as well as hormonal problems.

But fats are chemically different from cholesterol; the body burns fats for energy. That’s why food labels list fat and cholesterol separately.

There are between 32 and 45 different species of rattlesnakes known to science, and Arizona is home to many of them. 
This includes the sidewinder rattlesnake, which is renowned for its horns and side-winding movements, as well as the western diamond-backed rattlesnake, which is the largest rattlesnake in the West. Four species are under special protection in Arizona, according to the Arizona Game and Fish Department: the massasauga rattlesnake, the twin-spotted rattlesnake, the ridge-nosed rattlesnake, and the rock rattlesnake.

The venom in one bite is thought to be enough to kill 100 adults.

Dog owners in Turin, Italy will be fined up to €500 if they don’t walk their pets at least three times a day, under a new law from the city’s council. Italy considers itself an animal-loving nation and in many cities, stray cats are protected by law.

To enforce the law, Turin police would rely largely on the help of tipsters spotting cruel treatment by neighbors. Turin has the most stringent animal protection rules in the country. They even ban fairgrounds from giving away goldfish in bags.

It was tough navigating life as an ancient Egyptian, they had many Gods to please. They worshipped hundreds of Gods and Goddesses and had to constantly work to make them all happy to keep their life in balance and to ensure their place in the afterlife. Over the years Gods fell in and out of fashion just as our celebrities do today. Some of the most enduring Gods were Isis, Osiris, and Ra – The Sun God.

Maine was once a region of Massachusetts, but the state was unable to defend itself against foreign invasion. Residents advocated for statehood so that they could defend themselves. Maine was accepted as the 23rd state in 1820. Missouri followed the next year.

A cow produces 6.3 gallons of milk per day on average. That equates to nearly 2,300 gallons per year. In one year, a single cow produced 59,298 pounds of milk. The record is held by Robtham Suzette Paddy, a Holstein cow from the family-run Robthom Farm near Springfield, Missouri. Sue could produce more than 200 pounds per day at her peak.

When it came to popular medicine in the 1830s, ketchup was all the rage. An Ohio physician called John Cook advertised it as a treatment for dyspepsia in 1834. It wasn't popular as a condiment until the late 1800s. 

Danielle Fernandes' formal name is Danielle Fernandes Fernande Dominique Schuelein-Steel, better known as Danielle Steel, is an American novelist who is the best-selling author alive today and the fourth-bestselling author of all time, with over 800 million copies sold.

On June 2, 1975, several national cricket matches were postponed due to snow showers. The lowest summer temperature ever recorded in the UK was -5.6 °C on June 9, 1955, in Dalwhinnie, and it was again recorded on June 1 and June 3, 1962, in Santon Downham, Norfolk.

Viking refers to a procedure in which exhausted rowers aboard a ship turned up their seats to the fresh rowers in Old Norse. The title usually refers to a man who works aboard a ship. Another suggestion is that the title is derived from the Norse phrase for a sea-mile. Even though it makes the connection between man and the water, this idea is less widely recognized among academics. The phrase, which has Old English roots, refers to a poem from the 9th century about pirates and raids from Scandinavia.

Einstein was naturally fascinated about creating, having spent seven years working in the Swiss Patent Office, and would acquire about 50 patents throughout his career. He loved fiddling with electronics and went on to invent a self-adjusting camera, a refrigerator that could last 100 years, and even a blouse.

The Hurt Locker' broke another film industry record when it bagged six Oscars out of a total of nine nominations - including the coveted Best Picture gong - as the lowest-grossing movie to ever win at the Oscars. It is estimated to have earned $21 million at the box office, that's less than 2% of what its competitor 'Avatar' made in ticket sales in the same year.

You may have heard from friends or family that you should drink a glass of water immediately after drinking coffee because too much caffeine will make you thirsty or dehydrate you. While caffeine is a diuretic, studies have shown that when consumed in moderate amounts, it does not cause dehydration. Tea contains far less caffeine than coffee, so tea drinkers can also relax. In fact, coffee and tea can count toward your daily water requirement! Just don't consume more than 400 mg of caffeine per day, and remember that plain water is still the best beverage available.

Astronauts who return from space are 3% taller than when they left. Because of the lack of gravity, they are taller, and their cartilage discs expand in microgravity. You stand higher in the morning because your spine has been free of gravity's downward pull for 8 hours. The rest also allows your spinal disc cartilage to plump up, making you taller!

Niacinamide also called nicotinamide, is a form of vitamin B-3, an essential nutrient. A B-3 deficiency can lead to disorders of the skin, kidneys, and brain. Taking niacinamide can help prevent B-3 deficiency.

Rorschach felt that the results of his test may reveal a person's psychological condition. Those who ruminate on details may see more pictures in motion, whereas creative types may experience more images in motion. Depressed people were reported to be unconcerned by the introduction of color, whilst "neurotics" were said to be disturbed by the abrupt burst of red. Teenagers were the only people he believed the test failed to examine because they had too many characteristics with the seriously crazy.

You might be tempted to take off the white flesh that lies between you and the luscious fruit as you peel back the grapefruit's outer skin. Pith is the term for that white flesh. And you might decide not to discard it.

We don't even know how many stars there are in the cosmos. We now use our best estimate of the number of stars in our own galaxy, the Milky Way. Then we increase that figure by our best estimation for the number of galaxies in the cosmos. After all of that calculation, NASA can confidently state that there are zillions upon zillions of uncountable stars. A billion is an endless number.

As of today, Indonesia has 17,504 islands, however as climate change happens and sea levels rise, this will change over time. Although many officials continue to question the precise figure, the Indonesian government has proclaimed that this is the number for the time being, according to the Indonesian Coordinating Ministry for Maritime Affairs. Indonesia's incredible number of islands comprise the world's biggest archipelago, ranging from palm-fringed little islets to dense-jungle volcanoes towering up from the frothy sea waters.

You wouldn't anticipate centipedes to be perfect mothers given how brutal they are. Though it may come as a surprise, some species are actually fiercely protective of their young. In order to shield their eggs from predators until they hatch, females of the aforementioned species will encircle them. Some mothers will stay with their babies until they are old enough to leave the nest on their own, and these mothers will also clean the eggs to stop them from growing fungi.