If you've ever considered memorizing all of the different species of butterflies, it might take a little longer than you expected. Those species that are usually found in the lower 48 states of the United States would be a good place to start. Still, that figure is close to 575, so we recommend making note cards or focusing on the butterflies you see in and around your yard this spring and summer.

Finding easier modes of transportation than walking becomes crucial if you reside in a region that is primarily covered in snow. As a result, some of the early Inuit tribes are credited with developing qamutiks, or dogsleds, and qajaqs, or kayaks. Larger Inuit communities were frequently ferried across the lake on umiaqs. The same materials that were used to build their vessels were also utilised to build the dogsleds, which were made of wood and whale bones.

It's not impossible to get your vitamin D needs to be met only through diet, but it might be challenging because so few foods contain enough D, according to Kimberlain. Fish, such as 3 ounces of salmon, or 12 cups of white mushrooms treated with UV radiation are excellent food sources of vitamin D, according to the NIH.

Pompeii was thought to have originally belonged to and had been ruled and inhabited by, the ancient Greeks before becoming a Roman town, according to researchers. While the precise dates of the Greeks' occupation of the region are unknown, Pompeii does contain fragments of a Greek Doric Temple. This temple, which dates to the sixth century BC, is accessible as a day trip from Rome.

The Mayans used innovative military techniques. During battles, they would toss hornet nests upon the advancing enemy.

Cataracts that are left untreated will eventually get worse. Your vision will decline, making it risky to drive and do daily activities. The harsh reality of untreated cataracts is that they can eventually result in partial or even total blindness.

Karl Schwanzer, an Austrian architect, created the BMW headquarters in Munich, which took four years to complete. Construction lasted from 1968 to 1972, with the goal of finishing in time for the 1972 Summer Olympics. The building, which is located close to Olympiapark, has served as the BMW headquarters since 1972. The design is inspired by a BMW engine, with four towers signifying four engine cylinders. The four interconnecting towers are hung on top of a single foundation. The building has a total of 22 stories, 18 of which are utilised as office space.

Chia seeds are simple to add to bread, muffins, pancakes, cookies, and other baked goods! For some of my chia seed recipes, continue reading. 
 

Patients with pancreatic cancer may occasionally undergo a difficult procedure known as a Whipple procedure that entails the removal of the pancreatic head, a portion of the small intestine, the gallbladder, the bile duct, and occasionally even a portion of the stomach. However, only a small percentage of those with pancreatic cancer can undergo surgery.

The Denmark Strait cataract is the world's highest underwater waterfall, with a drop of 11,500 feet (3,505 metres) in the Atlantic Ocean.

Lower levels are almost biologically dead. One of the most intriguing aspects of the Black Sea is its absence of oxygen, which is required for life. Because oxygen can only be dissolved in the sea's top layers, anything below 230-330 feet in the centre and 330-500 feet at the edge is effectively a dead zone. Only particular bacteria can thrive in these areas, which account for more than 90% of the deeper water.

Assume someone falls into a black hole and an observer observes this. The time of the individual who fell into the black hole slows down in comparison to the one viewing. This is explained by Einstein's Theory of General Relativity, which posits that while travelling at high speeds close to the light, time is altered by how fast you are moving.

When all of the time spent by every gamer playing Call of Duty back-to-back is added together, it equals 2.85 million years of gameplay. Humans haven't even been on the planet that long. Call of Duty has far outpaced evolution!

In 2016, a Ukrainian aero-engineer unveiled a system that would allow pilots to eject the cabin of a plane if the engine failed. After ejection, parachutes would be deployed to safely lower passengers to the ground. However, as it turns out, most crashes are not caused by engine failure. Because problems typically occur during takeoff and landing, the pilots would have very little time to successfully eject the cabin and save passengers. But kudos for your effort!

Harvard is an Ivy League school. These schools were first known to have highly competitive athletic teams. As the teams gained more funding, the universities improved their standards of education and as a result, these schools are now an elite group that produces distinguished graduates. Ironically, Harvard actually tried banning football twice because of its violent and dangerous characteristics. However, the pressure from alumni and students has helped keep Harvard’s football legacy intact. The first stadium was completed in 1903. Their biggest rival? Another Ivy – Yale!

At least among women, that is. A 2013 survey of 10,000 U.K. women reported by Hello! found that Leos were twice as likely to go to the gym compared to any other sign.

Even though the first cataract extraction operation was conducted in the 18th century, cataracts have really been treated for a much longer. In actuality, the earliest known cataract operation took place in the fifth century BC. As a result, it ranks among the earliest surgical techniques ever performed. The methods employed then were undoubtedly less advanced than those used now or even in the 18th century. When the lens was fully opaque and hard, a procedure called "couching" was applied. This involved poking the eye with a sharp item or striking it with a blunt one.

Can you imagine Prince Harry as king—even before the scandal of his stepping down from royal duties? Back in 1837, the unthinkable became reality for Victoria. At birth, Victoria was fifth in line to the throne, but the deaths of various princes and a lack of male heirs resulted in the young woman capturing the crown.

The colour is a result of an antioxidant called anthocyanin, a naturally occurring pigment that is great for blood pressure control and eye health. Additionally a great source of fibre and vitamin C are blueberries.

How much melanin, or pigment, is present in the eye affects the color of the eye The color of the eyes will be darker if there is a lot of melanin present. 

Mango is not only the national fruit of India, but also of Pakistan and the Philippines.Mango is a true star of the summer because it is juicy, pulpy, and delicious. This season, make sure to sample as many as you can.

Each gold-plated Oscar award costs $500 to make and weighs around 8 and a half pounds. Chicago-based company R.S. Owens starts manufacturing the Oscar statuettes one year in advance of the show. 

These two gorgeous names are associated with Sri Lanka. This little island country is known as the Pearl of the Indian Ocean because of its remarkable natural beauty, extraordinary biodiversity, and rare jewels. Furthermore, the island is shaped like a teardrop and is located off the coast of India, making it simpler to locate on a map. That is why it is also known as India's Teardrop. A Google map of Sri Lanka is shown below to give you an idea of its location and form.

Anyone who visits Myanmar will notice people in the streets with what seems like mud smeared over their faces. This is a little disconcerting at first but it’s nothing to worry about.

Actually, it’s a special mixture of powdered bark that comes from a particular tree. When it’s produced, locals wipe it on their faces to act as protection against the sun. Some also say that it’s good for the skin and has anti-aging properties. When you’re in the country, try it for yourself and you can make up your own mind.