Since the 13th century, passports have been in use. This concept was introduced by King Henry V to make it easier to prove his nationality and identity when traveling to foreign lands. However, they were not given the name 'passport' at the time.

Mount Katahdin is the highest peak in the American state of Maine. The name translates as "The Greatest Mountain." It is well-known in the hiking and mountaineering world as the northern end of the Appalachian Trail, at 5,268 feet above sea level – a pleasant sight after the 2,180-mile trek.

The root portion was utilized as a medication in the past to alleviate painful conditions like headaches and toothaches, rather than for cooking.
 

The Nabataeans, like many other ancient peoples, revered the sun as a source of light and life, and Petra's design reflects that reverence. Many of the city's most sacred spaces are designed to correspond to solar patterns, such as solstices. This meticulous design provides modern scientists and archaeologists with valuable insight into what the Nabataeans valued and how unique Petra must have been.

The symptoms for understanding whether your body clock is out of kilter are relatively straightforward:

You find it difficult to go to sleep.
You have restless nights, frequently waking throughout the night.
You wake up early and can’t fall back to sleep.

If you have ever been jet-lagged before, then this is exactly what an out of sync body clock feels like. Jet lag is simply a mismatch of the time of day and your body clock and is one of the primary causes of an out of time sleep-wake rhythm.

Going through a list of America's most notorious serial killers, two signs stand out above all the rest: Pisces and Gemini. Pisces are known for being loners, and Geminis are known for their charm—two characteristics commonly found in serial murderers.

When you look at the shape of the letters, you can see how your tongue moves to pronounce them.

Due to the dramatic increase of educational institutions in Pune, it has become a national hub for education. It is no surprise that the city is known as the Oxford of the East because thousands of international students graduate from its esteemed universities.

We may not anticipate it, but what we wear directly impacts why mosquitoes won't leave us alone. These little insects are drawn to dark colors because, according to this study, black attracts more mosquitos than white. According to the same study, these flying insects are drawn to heat, which dark colors absorb more than bright hues.

The demise of massive stars results in black holes because the gravity of the star overwhelms the natural pressure that the star maintains to sustain its form. When the pressure from nuclear reactions drops, gravity overwhelms and destroys the star's core, and the star's various layers are hurled off into space, resulting in a supernova. The rest of the core collapses, leaving a place overrun by density and devoid of volume — a black hole.

Charlotte and Emily left the parsonage in 1842 to go to the Pensionnat Héger in Brussels, Belgium. They studied literature, German, and French with the intention of becoming teachers or opening their own schools. While there, Charlotte developed feelings for Constantin Héger, the school's married head of school. She actually developed an unhealthy obsession with him.

Set out a day to go on an adventurous trip exploring all the temples stamped on the back of the Baht coins. And don't worry, it's possible to see them all in a day - as has been done by many tourists before. The temples are:

1 THB coin - Wat Phra Kaew (Temple of the Emerald Buddha, inside The Grand Palace)
2 THB coin - Wat Saket (Temple on the Mount)
5 THB coin - Wat Benjamabophit (The Marble Temple)
10 THB coin - Wat Arun (Temple of Dawn)

You may have be aware that Valentine's Day was named after its patron saint, St. Valentine — but there is some debate about which St. Valentine the celebration truly commemorates. According to History.com, at least two persons called Valentine may have inspired the festival, one of whom was a priest in third-century Rome. According to legend, this Valentine disobeyed Emperor Claudius II's marriage ban (he believed it distracted young troops), illegally married couples in the spirit of love until he was apprehended and put to death.

The Tonle Sap supports about half of Cambodia's agriculture and is a key fishing source. The incredible thing about this lake is that it regenerates in major areas throughout the rainy season when monsoon rains fall and flood the centre area between Siem Reap and Phnom Penh.

This herb has various applications. There are several benefits that thyme can provide, including the ability to stop diarrhea, treat infections, treat kidney stones and gout, treat coughs and colds, lower bad cholesterol, lower blood pressure, alleviate menstrual cramps, combat depression, and anxiety, as well as soothe sore throats.

Collagen in your body aids in the prevention of free radical oxidation in your skin. When free radicals are oxidised, they can cause skin damage and pigmentation. On the other hand, if free radicals outnumber collagen levels, they can inhibit collagen production and harm healthy skin cells. To avoid this problem, increase your intake of antioxidants to neutralise free radical levels in your body.

St. David's in Pembrokeshire is the world's smallest cathedral city, with a population of only 2,000 people. It is also the only city in the United Kingdom that is totally surrounded by a national park.

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!

Many people find it difficult to understand that a city with so many buildings also offers so much natural beauty. Hiking the green paths is a popular weekend activity among Hong Kong residents.

World War I was a disaster on scales that most of us alive now cannot understand. What about this as an example? The total number of fatalities. France lost about 1,360,000 men during World War I. In comparison, the United States has reported around 1,350,000 military casualties in total throughout all wars since 1775.

So many popular perfumes contain musk, but the origins of this scent will shock you. Musk is a reddish-brown secretion from the "musk pod" of the male musk deer. It is such a popular ingredient that it is even mentioned in Kabir’s poems. However, since its popularity encouraged the hunting of this endangered deer, its scent is now replicated synthetically.

No, dulce de leche is not the same as butterscotch. Butterscotch is prepared by simmering brown sugar with butter, and it has a sweeter and softer flavour than caramel. Dulce de leche is produced by gently heating cow milk and sugar. Cajeta is dulce de leche produced from goat milk.

The average snowflake can be as small as a penny or as large as a human hair. However, some unconfirmed sources claim they can grow much larger. Witnesses to a snowstorm in Fort Keogh, Montana in 1887 reported seeing milk-pan-sized crystals fall from the sky. If this is correct, they would be the largest snowflakes ever seen, measuring about 15 inches across.