The early toothbrushes were little more than "chew sticks," which were tiny frayed twigs used to scrape plaque and food residue off and between teeth. Twisting and rubbing these sticks against their teeth was a slight improvement over the traditional way of rubbing and cleaning the teeth with plants, feathers, or anything else. To refresh the breath, certain chew sticks were constructed from aromatic wood. Chew sticks have been found as far back as Babylon, Egypt, and China.

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.

Back in the 1970s, Paul and David Merage came up with the idea for microwavable "sandwiches." The product initially appeared on grocery store shelves in 1983.

Termites have natural predators just like many other animals. Ants are termites' main predators, destroying entire colonies when they catch them off guard during an invasion. Ant and termite colonies are frequently constructed next to one another, which can lead to conflict as both insect species compete for food. Actual "wars" can start if an ant or termite ventures into the other's territory as soldier insects plan attacks on the adversary's colony.

Passport has been around for quite some time! In fact, it is mentioned in the Bible for the first time. It is found in The Book of Nehemiah, an Old Testament tome. Around 450BC, Nehemiah, an official in the service of King Artaxerxes I, the sixth King of the Achaemenid Empire of Persia, granted passage to Judea via a royal missive addressed "to the governors of the province beyond the river." The permission to freely circulate, granted in response to the royal request, is the beginning of what will formally become the passport, this laissez-passer that we know today.

A lot more, in fact. The canine actor earned $125 per week for his efforts, while the actors playing the Munchkins brought in just $50 a week.

Julia Roberts' reaction is genuine when Edward snaps the necklace case on Vivian's fingers—Richard Gere decided to improvise, surprising her. The moment was so endearing to the filmmakers that they decided to keep it in the film.

Even if you are an Indian citizen, you will need an inner line permission to explore Arunachal Pradesh, which enables you to stay for just 15 days.

Lamborghini's claim to fame is the creation of the first Viper engine. During the late 1980s, they created the Dodge Viper. Doge didn't want to just put a conventional truck engine in their automobiles. Instead, they commissioned Lamborghini to create an aluminium prototype of a Viper engine. Although this was not the final version, the prototype is still available. It is presently safely stored someplace in Detroit.

When railway tracks were being laid during the 18th century, oil traces were found in Digboi, which led to the first oil well being dug in the city. Because of this, Digboi is also known as the oil city of Assam. Digboi has the oldest oil well in operation. Apart from oil, Digboi is also famous for the Saikhowa Wildlife Sanctuary, the Golf Course, and its War Cemetry.

According to a 2017 Runners World poll, 40% of women have been harassed while running outside (and 58% if you're under 30), whereas men are not catcalled while running.

Iguanas are diurnal creatures, which means they are up throughout the day and asleep at night. They take full use of any sunshine in the wild, and illumination in terrariums is critical to their happiness and health. Iguanas go to sleep as it becomes dark or when the temperature lowers.

The vitamins, nutrients, and deliciousness are packed into every grapefruit hue. But the ones in red and pink have a little extra.

Speaking of the pyramids, I always thought that they were built by slaves. It wasn’t until visiting Cairo that I learned that the pyramids were in fact built by proper laborers. Archaeological discoveries proved that there were purpose-built villages to house the workers and they were fed and treated well. The things you learn when you travel fill our little heads with tons of fun facts!

Despite what many people think, stress does not lead to stomach ulcers. Neither do spicy meals trigger them. Stress, though, can exacerbate ulcers. Stress management can be useful in treating ulcers. Avoiding greasy and spicy foods might also help symptoms subside.

This lowers your risk of developing acne but also makes it easier for your skin to become dry. Insufficient skin hydration is one of the main causes of fine wrinkles, but fortunately, it's simple to address with a decent moisturizer.

Do you want a large, muscular baby? Then formula is your ticket, according to a study published in the Journal of Proteome Research by UC Davis. Researchers discovered that when five formula-fed infant rhesus monkeys were compared to five breastfed monkeys, the former developed quicker and bigger than the latter. One probable explanation is that formula includes higher protein than breast milk: human milk contains 8% protein whereas rhesus monkey milk contains 11.6 percent. At 18%, formula outperforms both.

You are not required to write about your deepest fears or your most ardent crushes, as you did in middle school. Rather, keep track of when your migraines occur. Take note of when they began, what you were doing, what you ate and drank in the previous 24 hours, and your menstrual cycle, if you're a woman. This can assist you in determining your migraine triggers.

Yes, that's right! Some desert lizards are supposed to be capable of living their entire lives without drinking water. This is a hotly discussed topic among reptile enthusiasts, as there is evidence both for and against it. Most lizard species, especially those from swampy or marshy locations, will require fresh drinking water. If you want to keep a lizard as a pet, you should do a lot of research before buying one to make sure you set up your vivarium properly!

These jelly-like, slimy animals are a sight to behold, pulsing through the ocean currents, and can be found in water both warm and cold, shallow and deep, and even along coastlines. The species comes in a variety of brilliant colours and is bioluminescent, which means it can generate its own light.

Cambodians think that counting the chirps of a gecko would reveal whether or not you will be lucky enough to marry. If a tokay gecko makes seven or more calls in the same room as you, it is considered lucky.

Because of their keen sense of smell, beagles can even detect pregnancy. Elvis, a beagle, was taught specifically to determine whether polar bears in zoos are pregnant, earning him the moniker "polar bear pregnancy detector." Although it's a strange career, Elvis was made for it!

Termites produce a lot of gas as they break down the wood and other materials they've eaten. Considering the size of a termite, this may not seem like much, but the gas accumulates. In fact, this amount is so large that termites are responsible for about 20 million tonnes of methane emissions annually on a global scale. That much gas is a lot!