Top 12 Most Intriguing Facts in the World You Might Not Know

Glaciers play a significant role when it comes to the world's water supply. Nearly 10% of the Earth's land area is currently covered by glaciers, primarily in places like Greenland and the Antarctic. Glaciers can be thought of as frozen rivers, and like rivers, they flow downhill, sculpting landscapes and transporting water in Earth's water cycle. Glaciers are crucial components of Earth's water cycle and influence the volume, variability, and quality of water flow in the areas where they occur.

Only a little over 96% of the total water on Earth is stored in oceans, according to the US Geological Survey's Water in Crisis: A Guide to the World's Fresh Water Resources. However, that is primarily salty water. To find the majority of the world's fresh water, you'd need to trek to the poles, as 68.7% of it is held in ice caps, permanent snow, and glaciers. Glaciers store about 69% of the world's fresh water, and if all land ice melted, sea levels would rise about 70 meters.

Exploring beneath the vast ice sheets and glaciers is no longer unfamiliar to science. In recent years, researchers have uncovered mountain ranges, colossal meteorite craters, and even thriving bacteria in an environment deemed too frigid for life. Now, researchers at the University of Vermont have found something intriguing within the ice core drilled nearly a mile beneath Greenland's Ice Sheet. At a depth of 15 ft below the bottom, lies a layer of frozen sediment, complete with plant remains like branches, moss, and leaves.

Approximately 80% of Greenland is covered by the Greenland Ice Sheet, which Britannica once explained as the 'largest and possibly unique relic of the Pleistocene ice sheet in the Northern Hemisphere.' At the bottom of a core sample up to 1.4 km deep, extracted in 1966 at the Camp Century site during the Cold War, researchers found 'well-preserved fossil plants and biological molecules,' indicating that the ice sheet has melted and reformed at least once in the past million years.

If you're a rainbow enthusiast and want to witness the stunning phenomenon, look no further than Hawaii. A study published by the American Meteorological Society in 2021 noted that 'the region's mountains create large cloud and rainfall gradients, key to observing abundant rainbows.' Air pollution, pollen, and a significant amount of moisture also contribute to Hawaii topping the charts in terms of rainbow quantity and quality.

Hawaii is renowned as one of the most beautiful states in the US and a tourist paradise. Among all the small islands in the Hawaiian archipelago, Kauai stands out as the place with the most rainbows. To create a vivid rainbow, two main ingredients are needed: water and sunlight. In Hawaii, the abundance of sunlight and water in the archipelago, combined with their geographical location, makes rainbows common across the islands. The abundance of rainbows appearing on the island is the reason why Hawaii is called the 'rainbow state'!

Finding previously undiscovered creatures at the depths of the ocean sounds like something straight out of a sci-fi horror movie, but a 2020 study on an undersea volcano near New Zealand, published in the Proceedings of the National Academy of Sciences of the United States of America, revealed 'more than 90 bacterial and archaeal phyla and nearly 300 previously unknown genera.'

Some studies have linked hydrothermal vents, such as deep-sea volcanoes, to the 'origin of life.' Scientists encountered these organisms and many others during a three-week expedition this spring across four deep-sea regions within the Kermadec Ridge's Rich Volcanic Chain. Encompassing 3,800 square miles (9,840 square kilometers), the research area included undersea mountains, continental slopes, trench valleys, and hydrothermal vent fields where undersea volcanoes release hot water and gases. Yeti crabs, 'hairy' lobsters, and 'Mickey Mouse' squid were among the species discovered in a recent survey of underwater volcanoes and trench valleys.

According to a recent study, the sounds of sperm whale songs can penetrate through sediment layers and rock formations beneath the ocean floor. Sperm whales are incredibly large, so their low-frequency calls can generate over 185 decibels underwater, equivalent to that of a large ship. Researchers often use the low-frequency sounds of endangered sperm whales (Balaenoptera Physalus) to study the distribution of the species in the oceans.

Essentially, sperm whales are the Barry White of the ocean. According to Scientific American, the deep booming songs that males use to attract mates are among the loudest of any marine creature and can be 'heard up to 1,000 km away.' They can also be used to map the ocean floor because sound can reach depths of 2.5 km (1.6 miles) underwater, bounce back, and provide researchers with precise measurements. Furthermore, a 2021 study in Science demonstrated how using sperm whale clicks could be far more useful and less detrimental to marine life compared to using large airguns, a common tool relied upon by researchers.

Your prized red roses won't turn emerald overnight, but the increase in ultraviolet radiation due to depleted ozone layers over the decades has caused flowers worldwide to change color. A 2020 study led by scientists at Clemson University identified that UV pigments in flowers have increased over time, leading to the degradation of pollen. While we may not perceive the color change with the naked eye, it's a significant concern for pollinators.

Globally, flora and fauna have adjusted reproductive strategies, altered habitats, and changed their appearances as they rapidly adapt to the impacts of climate change, and flowers are no exception. Temperature shifts and aridity since 1895 have caused some flower species to shift from purple to white, and others from white to purple.

A Nepalese team set up a satellite positioning marker on Mount Everest to assess its precise location via GPS satellite. A Chinese team conducted a similar mission, though they used the Beidou constellation satellite produced by China along with other equipment. China and Nepal jointly announced a new official figure of 8,848.86 meters (29,031.69 feet) above sea level. The new height is 0.86 meters (over 2 feet) higher than the figure previously provided by the two nations led by Nepal.

Mount Everest may not physically grow, having reached maturity long ago; however, the latest measurements by surveyors representing China and Nepal show the mountain peak to be higher than previously thought. Previous estimates ranged from 29,002 feet above sea level in 1856 down to 29,029 feet in 1955, according to NPR. But after extensive GPS-based measurements of the mountain peak, experts now ascertain that Mount Everest stands at a colossal height of 29,031.69 feet, due to tectonic uplift. The mountain's height fluctuates. The movement of tectonic plates can gradually raise it, while earthquakes can bring it down.

No matter where you go, it's comforting to know that you can always enjoy a refreshing glass of Coca-Cola. While this fizzy beverage is practically sold everywhere, it still hasn't (officially) made its way to North Korea or Cuba. That's because these countries are under long-term trade sanctions by the US. That doesn't mean you can't get your hands on the beverage in any other way; it's just that importing or bottling the drink is officially impossible in these places.

Until 2012, Myanmar was also a country where you couldn't legally buy Coke. After the ban was lifted, the soft drink manufacturer invested $200 million to begin distribution in the region. On their website, Coca-Cola lists 202 markets across four regions where their beverage is sold and marketed. However, this figure must be approached with caution, as the company doesn't clarify what constitutes a market, and there are currently only 195 United Nations member states, with Taiwan being the potential 196th country.

Dentistry stands as one of the oldest branches of healthcare, dating back to 7000 BC alongside the Indus Valley Civilization. However, it wasn't until 5000 BC that descriptions related to dentistry and tooth decay became available. At that time, a Sumerian text described tooth decay as the cause of toothache, an idea not disproven until the 1700s!

In ancient Greece, Hippocrates and Aristotle wrote about dentistry, particularly about treating tooth decay, but it wasn't until 1530 that the first book entirely dedicated to dentistry was published. A small medical book covering all sorts of tooth diseases and maladies was released. By the 1700s, dentistry became a more defined profession. In 1723, Pierre Fauchard, a French surgeon considered the Father of Modern Dentistry, published his influential book, The Surgeon Dentist, a Treatise on Teeth, which for the first time defined a comprehensive system for dental care and treatment.

You might think twin births are rare, but the reality is they're becoming more common than ever. A recent study in the journal Human Reproduction reveals a doubling happening right now: Humans are having more twin pairs at this moment than at any other recorded point in history. It's attributed to a combination of changing demographics over time, as well as factors like higher in vitro fertilization (IVF) rates and an increase in older adults becoming first-time parents.

Scientists through their research believe this trend is due to older women having a higher propensity for giving birth to twins and women opting for family-building later than before. Highly effective reproductive assistance methods like IVF may also play a role. Twin births are proportionately represented across continents, so Asia and Africa, the two most populous continents, account for 80% of the total twin births worldwide.

The world population increases each year, yet we're not necessarily running out of physical space. In fact, all 7.8 billion of us could comfortably fit inside Los Angeles. Research has shown that you could squeeze about 10 people into a square meter, cramped elevator-style; Los Angeles spans about 1.2 billion square meters, meaning if we all congregated together, theoretically, the city could accommodate around 12 billion people.

However, Los Angeles is currently sparsely populated with just under 4 million in theory, large enough to hold the world's populace even as their numbers grow in the decades ahead. The United Nations estimates there will be 9.8 billion people by 2050 and 11.2 billion people by 2100, while the Wittgenstein Centre predicts the world population will peak at 9.4 billion in 2070 before declining to just under 9 billion by 2100.

According to the Daily Post, the Dragon's Breath Chile is currently the world's hottest chili pepper, reaching 2.48 million units on the Scoville scale, far surpassing its closest competitor, the Carolina Reaper, at 2.2 million units. The demon pepper, cultivated by grower Mike Smith in collaboration with the University of Nottingham, is 22 times hotter than the seemingly innocent habanero and nearly 300 times hotter than the everyday jalapeño.

Humans have yet to consume the Dragon's Breath, fearing that the potentially deadly amount of capsaicin could be inhaled into one's respiratory tract, causing them to close up and induce a protective shock. Hence, eating one of these tiny peppers could indeed kill you, though the intended purpose for this type of pepper is not immediate consumption. According to Smith, the Dragon's Breath was developed to treat individuals allergic to anesthetic drugs, as the pepper's heat can numb the skin and thus be used for numbing purposes.