Prior to the 1840s, toothbrushes had only one row of bristles. With the benefit of being able to cover a larger surface area in mind, toothbrush makers began introducing changes to the standard toothbrush design in about 1844. Three rows of bristles would later become the standard for most commercial toothbrushes, proving to be more effective than the previous single row.

Tokyo is massive, crowded, and noisy. However, it is also quite safe for all types of travelers. Crime is uncommon in this area. Tourist crimes are nearly unheard of. This is more than simply an opinion. Tokyo is frequently at the top of lists addressing safety and crime statistics.

It takes one particularly terrifying creep to inspire Hannibal Lecter, Norman Bates, and Leatherface, but that's the legacy left by horrifying serial killer Ed Gein. When he was finally caught and his house of horrors in Plainfield, Wisconsin, discovered, police found masks and lampshades made from human skin, among plenty of other atrocities. His astonishing depravity proved a source of creative inspiration.

Have you ever wanted to land on the moon but couldn't figure out how to do it because of rocket science? The beautiful settlement of Lamayuru, around 130 kilometres from Leh, is designed to look exactly like the moon's white surface! This breathtaking scenery, complete with a lovely Buddhist temple above, is a visual feast for the eyes. Two big festivals are held each year.

The owners of Swiggy have not indicated any desire to file an IPO and take the company public. The funding that it currently receives from its venture capital investors is more than enough to fully fund all of Swiggy’s expansion efforts. Swiggy may remain one of India’s largest privately-owned companies as there is no need for it to offer shares on the public stock exchange markets. We fully expect to see Swiggy continue to grow and expand throughout India, and perhaps other parts of the world in the years to come.

Tropical America is the Mimosa Pudica's original habitat. These days, it can be found on islands in the Pacific as well as in various areas of Asian countries.

World’s largest tea-growing state – Assam is considered the largest tea producing state in the whole world. Assam contributes more than 52 percent of the country’s total tea production.

Rio has been affectionately dubbed Cidade Maravilhosa, which translates as Marvelous City. Some of the reasons for this moniker include the combination of urban culture, magnificent shoreline, rocky peaks, and impressive forests.

If you or someone you know has ever quit smoking with nicotine gum, you can thank Sweden. Nicorette, the first product, was created by Leo AB in Helsingborg. It was inspired by the fact that while on duty, smoking Swedish submariners would switch from tobacco to chewing tobacco or snus to get their nicotine fix. Nicorette wasn't the first time nicotine was placed in chewing gum, but they did design a polymer that regulated the flow of nicotine into the bloodstream, allowing for a continuous release and a gradual withdrawal, allowing millions of people to stop for good.

Consuming grapefruit may enhance the quality of your diet and increase your consumption of vitamin C, magnesium, potassium, and dietary fiber, according to research.

Centipedes are skilled hunters due to their incredible speed and venomous forcipules. Smaller species primarily consume mollusks, worms, insects, and spiders. Larger species frequently eat small birds, bats, and frogs as food. Even other centipedes will be eaten by some centipedes! Their meals are somewhat dependent on what is available to them. Some centipedes will scavenge for food in a pinch, but most of the time, they will hunt for it. Centipedes hunt for prey with the help of their antennae and catch it with their speed. Then, after encircling their prey, they wait for their venom to take effect before consuming their meal. Really brutal, no? However, it does the job.

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. 

Michael Buble is Santa's favourite singer! Santa enjoys many types of music and is a fan of BTS and Ed Sheeran, but his favourite singer is Michael Buble! That's perhaps why Buble enjoys a Christmas tune!

Raw materials can be utilized to create kaleidoscopes. Pebbles and colorful stones will typically reflect good colorful shapes.

Charles Dickens was a bit of an outcast. Growing up in London during the nineteenth century exposed him to such grim realities as working-class life expectancy being twenty-two years old, half a million Londoners suffering and dying from typhus due to a lack of sanitation, 220 crimes being punishable by death, and nearly half of all funerals in London being held for children under the age of ten, the majority of whom had full-time jobs as labourers in 1839, when Dickens was 27.

There's a reason why it's called the "sunshine vitamin." According to Harvard Health Publishing, a molecule in your skin converts to vitamin D3 when the sun's ultraviolet B light strikes you. Your kidneys receive vitamin D3 from your liver and convert it into an active form that can be utilised by your body.

Many people argue that candy corn tastes like chicken feed, but that is not how it got its name. George Renninger invented it in the 1880s, and Goelitz Confectionery Company (now Jelly Belly Co.) popularised it around the turn of the century. Because corn was used to feed chickens, the product was dubbed "Chicken Feed," and the box featured a colourful rooster.

The biological cycling of nutrients in the Southern Ocean is significantly influenced by krill. For instance, krill migrate in swarms to deep water and then excrete their excrement, transporting significant amounts of that carbon to the ocean's depths after eating on algae that have absorbed atmospheric carbon dioxide at the sea surface.

According to research. However, scientists will be unable to determine how long lobsters live because traps are not designed to catch the largest lobsters. "When we get a 20-30 pounder, it's because a claw got hooked in the trap's entry, not inside," explains Robert C. Bayer, executive director of The Lobster Institute at the University of Maine.

Tea in Sri Lanka is equivalent to coffee in Laos. Lattes, espressos, and cappuccinos abound in Laos, and the Arabica coffee bean is the country's most important agricultural export. Every year, coffee plantations grow and extend across the country, and high-quality beans are in high demand in the international market. Cheers to all things caffeinated!

The fairy wasp can be found in a wide range of environments, from deserts to tropical forests, as was already mentioned. At least five species, including the Caraphractus cinctus, which can remain submerged for up to 15 days, are known to thrive in aquatic habitats.

In addition to being lovely, sunflowers are also regarded as a medicinal herb. Sunflower tea is excellent for colds and fevers. Every component of the sunflower, from the seeds to the roots, can be used to treat a variety of diseases and inflammation.

Santa and Mrs. Claus are Canadian citizens! Mr. and Mrs. Claus were given their own Canadian e-passports by Canadian Immigration Minister Chris Alexander in 2013.

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.