A shock wave can be produced by sound. Sharp and repetitive sounds, such as drumming, can cause shock waves when an object vibrates at a high pace. A shock wave is produced by a loud bang or clap. While a shock wave caused by a clap is harmless, a shock wave caused by an explosion is deadly since it can kill many people.

Toners are essential, particularly in the summer because they prepare your skin for moisturization and get rid of extra oil and impurities. We've put together a list of the numerous toner kinds for different skin types to get you started, and it will aid you in making the best decision.

Dolores Umbridge, the worst villain in the Harry Potter series, wound condemned to Azkaban after Order of the Phoenix. According to Pottermore, the reason was that she was involved in imprisoning, torturing, and even ordering the deaths of several innocent witches and wizards during the Second Wizarding War. Being the worst fictional villain since Hannibal Lecter, on the other hand, is a fairly good justification to be imprisoned in Azkaban on its own. Was she worse than him who shall not be named? Maybe not, but wizards and witches like this one were crucial to his machinations, so she's surely in the running for the worst of the wizarding worst.

In the world's oceans, lakes, and freshwater rivers, stingrays are thought to exist in roughly 220 different species. One of the ocean's rarest species, the small eye stingray has a wingspan of nearly 7 feet, white markings, and tiny eyes (hence the nickname). 7 Only a few sightings were reported before the early 2000s, but this is gradually changing; in the previous 15 years, researchers have counted 70 sightings off the southern Mozambique coast.

The Teutonic Order's Castle at Malbork is the world's largest castle in terms of land area. It is a UNESCO World Heritage Site and was originally erected in the 13th century as a Teutonic castle and stronghold. In that regard, Poland is home to a whopping 15 UNESCO World Heritage Sites!

There is a gruesome murder tale set at Harvard, famously known as the Parkman-Webster murder case. Parkman, a high-profile businessman and Harvard alum lent money to Webster, a Harvard professor. Parkman visited Webster to confront him about the repayment and ended up burnt and dismembered in Webster’s laboratory. The trial of Webster was a milestone for the US legal system as it was reportedly the first case in US history where forensic anthropology has been used to prosecute the murderer. Harvard went on to embrace the field of forensics. Allegedly, there is a class at Harvard devoted to saying witty things while putting sunglasses on.

This may frighten you, but according to research, you should never be more than 10 feet away from a spider. Don't worry, most of the time they're hidden away in some crevice, minding their own business.

You may not have considered it, but another reason Switzerland is a fantastic place to live is for a healthy lifestyle. According to the World Health Organization, Switzerland has the lowest obesity rate in Europe, with only 17.5% of the population obese. If you lived in the United States, you'd be twice as likely to be fat because 33% of the population is.

The only creatures that live permanently on Mt. Everest are jumping spiders. Jumping spiders lurk in nooks and crannies on the slopes of Everest at a height of 6,700 meters (22,000 ft), making them one of the Earth's highest permanent dwellers. Animals such as the snow leopard, Himalayan tahr (a goat-like species), and Himalayan yak may be found below an elevation of 6,000 meters.

Are you prone to mosquito bites? Iceland will suit you perfectly! Iceland is mosquito-free, thanks to a lack of small ponds and temperatures that are unfavourable for mosquito breeding – so you can sleep with your windows open anytime you like.

When our airways are too small to allow the air to leave our lungs quickly enough, we develop asthma, and wheezing is the result of the air becoming turbulent when it is expelled too quickly. Comparable like switching from a regular drinking straw to a thin cocktail straw: considerably more difficult to transport fluids. However, a number of factors, such as having narrower airways at birth or experiencing inflammation or mucus when ill, can also cause that narrowing. Kids' airways expand as they get older. This frequently helps with asthma problems.

Taman Negara is the world's oldest tropical rainforest, believed to be more than 130 million years old. Taman Negara translates to "national park" in Malay. To enter the park, you must obtain special authorization from the government, but it is definitely worth it if you have the time. Rare creatures like as the Malayan tiger, crab-eating macaques, Sumatran rhinos, and even the Asian elephant call this jungle home.

Activision recorded nearly 5 million gamers playing Call of Duty at the same time during the days of Black Ops and Modern Warfare 2. Except for New York, this is a substantially larger population than practically any other city in the United States.

We used to think that stress caused sores in your stomach that doesn’t heal. We now know that prolonged use of nonsteroidal anti-inflammatory drugs (NSAIDs), such as aspirin, ibuprofen (Motrin®, Advil®), or naproxen (Aleve®), can interfere with stomach mucus.

Ulcers result when stomach acid reaches the lining, and when they bleed they can cause pain and even be life-threatening.

A bacterium called Helicobacter pylori, or H. pylori, also can cause ulcers. An Australian doctor proved this by drinking the bacteria himself, and he and his colleague won a Nobel prize for the discovery. 

The Sun reported on the astrological analysis done by UK Domain on the most recent Forbes list of billionaires. As it happens, Libra claimed the most—an impressive 27 billionaires. "And considering how Libras tend to be organized perfectionists obsessed with balance," the outlet notes, "it'll come as no surprise really."

Keeping things as Hollywood as possible, the Academy Awards are held at the impressive Dolby Theatre in the Ovation Hollywood shopping mall every year. Located on Hollywood Boulevard and Highland Avenue, the auditorium first opened in 2001 and has been the home of the Oscars since then. Originally known as the Kodack Theatre, Dolby Laboratories signed a 20-year naming deal in 2012.

The famous Ice Hotel is located in the Swedish town of Jukkasjärvi. Every year, the hotel is built from two-tonne slabs of ice from the neighbouring Torne River. Starting from the ground up, construction of the hotel begins as soon as the cold season comes in the Arctic. Builders and artists collaborate to construct a hotel that is unique each time. And if you ever believe health and safety standards go too far, consider the proprietors of the Ice Hotel. Despite being entirely built of frozen water, the massive igloo is nevertheless necessary to have fire alarms installed!

Despite the fact that Afrikaans uses vocabulary with Malay, African, and French roots, it differs significantly from Dutch and wasn't recognized as an official language until 1925. Prior to this, it was sometimes referred to as "Kitchen Dutch" and was seen as a poor or mixed variety of Dutch used only by individuals with little formal education.

Pulpally in Wayanad is home to Kerala's only Luv Kush Temple. The 'Sita Lava Kusha Temple is said to have formerly been inhabited by Sita Devi.

Starbucks actually has a few secret shops, according to The Seattle Times. One is known as Roy Street Coffee & Tea in Seattle and they sell things that aren't on typical Starbucks menus. This includes things like wine, beer, and gourmet cheeses that can't be mass-produced. They sometimes use the secret shops to test out new products as well.

Catnip's hidden ingredients include nepetalactone, an organic substance, and nepetalic acid, a metabolic consequence of nepetalactone. While ingesting it works, Demos claims that even smelling it might pique kitty's curiosity.

Ayurveda, India's ancient medical system, divides food into three categories: Satvic, Rajasic, and Tamasic. Satvic food is made up of all natural and minimally processed ingredients, such as vegetables, and is thought to have a positive, calming, and purifying effect on the body and mind. Rajasic food is spicy, oily, salty, or bitter, and it fuels ambition, competition, and egotistical desires. Tamasic food is highly processed, toxic, and difficult to digest, and it has a negative impact on both the mind and the body.

The Batcave made its television debut. The Batcave, as well as a slim Alfred Pennyworth, were presented in a 1943 TV serial called The Batman. Batman's all-encompassing awareness of everyone's secrets, whether friend or foe, defines him. But this time, we did the research on the Dark Knight, and we uncovered some lesser-known facts about him, ranging from his lost "first film" to some insane comic-book achievements.

Santa's way of expressing happiness and joy is 'Ho Ho Ho'; if he said 'Ha Ha Ha,' people might think he was laughing at them!

Middle schoolers and anyone trying to understand the latest slang terms loves Urban Dictionary, an online, crowdsourced listing of millions of slang words and phrases. However, Urban Dictionary is more than just a dictionary. It also has an online store where you can buy mugs, T-shirts, an official card game, and plush dolls based on dirty phrases popularised by the dictionary (like Golden Shower and Donkey Punch). If you don't know what those disgusting phrases mean, we'll let you look them up, but don't say we didn't warn you.