In A.D. 363, a massive earthquake struck Petra, leveling most of the city and bringing the city's reign as a thriving and prosperous trading center to an end. Following the disaster, many Petra residents left the area, and the city was lost to the ages.

This one from Amazing Facts About Hindi tells us about the origins of Hindi films. Raja Harishchandra is the plot of Hindi cinema's future.

One of the few whale species with unfused cervical neck vertebrae is the beluga. They have highly flexible necks as a result of this, and their heads may move in all directions.

Thanks to its microscopic budget and major success at the box office, the 2007 film Paranormal Activity, scored a return on investment of 19,758 percent, absolutely blowing away the next most profitable film (2015 horror film Gallows, with an ROI of 6,843 percent). It cost just $60,000 to make and another $400,000 or so to market, yet ultimately brought in more than $89 million.

According to a study conducted by a German sex expert, women with red hair had sex more frequently. A comparable English study discovered that redhead girls had sex three times per week on average, whereas our blonde and brunette colleagues did it twice per week. It's a shame the guys weren't questioned as well.

If you order a venti whenever you're feeling extra exhausted and really need a boost, you're doing it wrong. It seems logical to assume that a larger cup would hold more caffeine than a smaller cup, but that's actually not true. According to an anonymous former Starbucks employee, both grande and venti espresso drinks contain two shots of espresso, at least in the location where they worked at. This is only true for hot drinks, as venti iced espresso drinks have three shots while grande iced drinks have two.

The scientist is most famous for calculated gravity, but it’s also believed that Isaac Newton invented the cat door. How Stuff Works writes that when Newton was working on his experiments at the University of Cambridge he was constantly interrupted by his cats scratching at the door. So he called the Cambridge carpenter to see two holes in the door, one for the mother cat and one for her kittens! Apparently, these holes can still be seen at the university today.

Take a look at your atlas if you haven't already! When turned 90 degrees, Nepal resembles the map of Portugal. It gives you something to brag about, doesn't it?

Most likely, when you hear the word armour, you picture steel-protected knights. Although the ancient Inuit had no access to steel, they nevertheless needed defence against the elements and dangerous creatures. Because of this, they created their own type of armour using bone plates, mainly carved from walrus teeth, and raw leather straps. The first Inuit people were able to escape several confrontations that would have almost surely been fatal without this innovative construction.

Karl Landsteiner identified blood types in the early 1900s, and that some types cannot mix. There are several ideas as to how these classifications came to be, but the subject of why humans have various blood types at all remains unresolved.

The human body is mainly composed of four elements: oxygen, carbon, hydrogen, and nitrogen, which make for 96.2 percent of your total weight. (Calcium and phosphorus are the other major contributors.) It's incredible how those ingredients work together to help produce a body that accomplishes absolutely extraordinary things every day, from battling cancer to creating 20,000 thoughts.

This fun fact about the Netherlands dates back to the 16h century when the Dutch invented gin (jenever) and introduced it to the British. It became popular in Great Britain after William of Orange (King William III) held the English, Irish and Scottish thrones. Ever wondered where the term ‘Dutch courage’ comes from? It’s said to originate from when the Brits and Dutch drank gin during the Thirty Years’ War from 1618 to 1648.

Women are superior conversationalists and social leaders because they are better at reading faces, gestures, and voice tones from birth. Even in a group of people, an alpha-type female would likely lead all social interactions rather than an alpha male.

Bamboo is grass, although many of the bigger woody bamboo species resemble trees and are commonly referred to as "bamboo trees."

The business created special socks that could detect when a user fell asleep and stop the show/movie so they didn't miss anything when they awoke. This pair of socks, dubbed 'Netflix Socks,' includes a sewn-in electrical gadget that monitors your pulse.

Because the Incas lacked a writing system, there are no written records of the people who lived there. Most archaeologists assume it was created as a royal estate by Emperor Pachacuti. Some believe it was a refuge for the Inca empire's high-ranking religious leaders and academics.

There are no hospitals or, more critically, birth rooms in the Vatican. As a result, no one may be a naturalised citizen of the Vatican. You are awarded citizenship based on your assignment to work in a certain capacity for the Holy See. Spouses, parents, and other family who reside together are granted citizenship. When the appointment expires, the citizenship is revoked.

Although Noah Webster was not the first American to create a dictionary, his name has come to be associated with the American dictionary. Webster wrote An American Dictionary of the English Language in the hopes of contributing to the creation of a uniquely American lexicon with Americanized spelling and pronunciation of words. Webster became serious about becoming an etymology expert in order to thoroughly research word origins and sources. To write his dictionary, he learned 26 languages, including Sanskrit and Old English. It was published in 1828 and included the first definitions of "American" words like chowder and skunk.

In their typical poses, flamingos tuck one foot under their body. It has not been proven, but one theory contends that they do it to retain body heat in the chilly water of their feeding areas. Surprisingly, a study revealed that this behaviour does not result in muscle strain in their legs, meaning they

Scholars think that Pachacuti Inca Yupanqui, who governed the Inca Empire from 1438 to 1471, began constructing Machu Picchu around 1450 AD. This is almost a millennium after the fall of the Roman Empire and less than a century before the arrival of the Spanish conquistadors in Peru.

Have you read the EULA (End User License Agreement) of Apple devices and services anytime? There is an interesting fact about that as well. This is a document with about 18,000 words. So, most of you might have not read it. However, in that document, it is said that you can’t use Apple devices and services to create nuclear bombs, missiles, chemical, or biological weapons. Interesting, isn’t it?

According to Alzheimer's Orange County, "as the size and proportion of the U.S. population 65 and older continue to expand, the number of Americans with Alzheimer's disease and other dementias will climb each year." The number of persons with Alzheimer's and other dementias is predicted to increase by more than 40% from 2015 to 7.1 million by 2025. With an estimated 13.8 million, this will almost triple by 2050.

With approximately 3,000 paintings, drawings, prints, and other specimens of 19th century ornamental art and design, the Birmingham Museum and Art Gallery, located next to the Town Hall, houses the world's greatest collection of Pre-Raphaelite paintings.

Some hermit crabs use living, growing Hydrocoral in the Sea of Cortez, while others in the Indo-Pacific region live in fixed wormholes left by marine worms.