مستوى مبتدئ

Finding a rare or unusual coin in the spare change you receive from your local grocery store, gas station, or restaurant may sound a little far-fetched and even absurd. However, don't rule out the possibility, at least until the over one million collectible coins given to retailers across the country by US coin dealers in honor of the 96th National Coin Week (April 21, 2019 to April 27, 2019), have been discovered. Called the Great American Coin Hunt, this first-of-its-kind treasure hunt is designed to inspire a new generation of kids and adults to start coin collections of their own....

Paleontologists had long believed that ancient humans used land bridges to migrate from one country to another. Hence, Luzon, the largest of the 7,641 islands that comprise the Philippine archipelago in the Western Pacific Ocean, appeared to be entirely out of reach for our ancestors. Now, there is evidence that a previously unknown human species managed to overcome the ocean currents and settle on the island between 50,000 and 67,000 years ago — around the same time as our species, the Homo sapiens and our closest ancestors, the Neanderthals, dwelled on Earth....

Looking for a fun Earth Day activity? You may want to try plogging, or picking up litter while jogging. Odd as it may sound, the new "sport" is becoming extremely popular with runners worldwide, many of whom are posting images of themselves and friends holding bags of trash on social media....

After almost twenty years in space — thirteen of which were spent making extraordinary discoveries about the Saturn system, including its rings and natural satellites — NASA's Cassini spacecraft finally ran out of fuel. However, shortly before plunging into Saturn's atmosphere on September 15, 2017, the probe completed one final important mission: six close flybys of tiny moons located inside, or near, Saturn's rings....

Need a reason to smile? Then you will be happy to know that today, March 20, 2019, is not just the first day of spring, but also the International Day of Happiness. Established by The United Nations (UN) in 2012, it is meant to remind us that happiness is an essential human goal and right. This year's theme, Happier Together, encourages people worldwide to focus on what we have in common, rather than what divides us....

What better way to welcome spring than by dousing yourself and your friends with vibrant colored powder? That is the essence of the popular Indian festival of Holi. Observed annually on the last full moon day of the Hindu lunar month, Phalguna, this year, the fun event will be celebrated on March 21, 2019....

Carbon dioxide (CO2), released by activities like burning of fossil fuels such as coal, oil, and natural gas, is one of the biggest contributors to the greenhouse effect, responsible for global warming. Over the years, scientists have come up with several innovative solutions to capture the polluting gas. However, none have been practical enough to implement on a large scale. Now, researchers at RMIT University in Melbourne, Australia believe they may have finally found a feasible way to reduce atmospheric CO2 – turning the gas back into coal!...

When a falling liquid droplet hits a surface, like a raindrop hitting pavement, it either flattens and spreads out evenly, or produces a sharp-edged splash. Now, a team of Chinese researchers has created a surface which allows the descending liquid to rebound and swirl around like a graceful dancer....

Shelby, who plays Bella in the recent Sony Pictures release A Dog’s Way Home, has all the traits of a celebrity pooch: bright, golden eyes, expressive eyebrows, and a big, brown nose. However, the pit bull mix did not always seem destined to be a movie star. About two years ago, Shelby was a stray puppy who lived on the streets and spent her days digging through trash for food scraps....

Experts estimate that Earth gets bombarded with thousands of pieces of cosmic debris each year. While most burn up in the atmosphere, a few hundred survive and hit the planet's surface annually. While the impact of the space rocks, which come hurtling down at rapid speeds, has thus far been minimal, the possibility of an asteroid landing in a densely populated area and causing severe damage cannot be ignored....

The severe winter storm that pummeled parts of Washington, D.C. with as much as six inches of snow on February 20, 2019 had most residents scrambling for the safety and warmth of their homes. However, Smithsonian's National Zoo's giant panda Bei Bei was not among them. The adorable three-year-old had the time of his life playing in the mounds of fresh powder that helped Washington, D.C. retain its stature as the snowiest major city on the US East Coast this year....

Experts assert that if food were a country, it would rank third behind China and the US as one of the biggest greenhouse gas polluters. The reason is the ever-rising demand for meat. Livestock farming is responsible for 14.5 percent of global methane emissions. While cows are the worse offenders, pigs, sheep, and other animals contribute as well....

Always wanted to experience the magical winter wonderland that Queen Elsa created in Disney's animated movie Frozen? Then you are in luck. Thanks to Utah-based company “Ice Castles,” acre-sized frozen fortresses are now a reality in six of North America's coldest regions: Dillon, CO, Excelsior, MN, Lake Geneva, WI, North Woodstock, New Hampshire, Midway, UT and Edmonton in Alberta, Canada....

The blast of Arctic air, which has caused a once-in-a-generation deep freeze across the US Midwest, has paralyzed the region’s cities and towns. Hundreds of schools are closed, thousands of flights and trains have been grounded, and most businesses were forced to shut. Authorities are cautioning residents to stay indoors during this unprecedented chilly weather pattern, which is cold enough to freeze boiling water in midair and can result in frostbite in as little as 5 minutes. The polar vortex’s only silver lining? The beautiful sun dogs being observed at many of the affected areas....

This year’s winter has been particularly harsh on the residents of the central and eastern United States, who have had to endure an abnormally cold weather pattern since the second week of January. Unfortunately, things are going to get even worse starting Tuesday, January 29, 2019. According to the National Weather Service (NWS), the extreme Arctic cold sweeping across the Midwest and Great Lakes will result in dangerously cold wind chills and cause temperatures in some cities to drop to their lowest levels in over two decades....

Most of us have, at some point, experienced travel congestion, especially during major holidays such as Christmas and Thanksgiving. However, nothing compares to the crowds triggered by the Chinese Lunar New Year, or Spring Festival, when millions of people make their way home – usually from cities to rural areas – to celebrate the all-important holiday with friends and family. The spring travel rush, or Chunyun, begins 15 days before the festival – which falls on February 5 this year – and ends 25 days after. The 40-day period collectively results in the world’s largest seasonal human migration. This year will be no exception....

A giant spinning wheel of ice on the surface of the Presumpscot River has enthralled crowds in Westbrook, Maine since Monday, January 14, 2019. Many locals have likened it to crop circles –strange patterns that appear mysteriously overnight in farmers' fields, which have long been theorized to be markers of extraterrestrial communication – and speculated that the icy ring is a landing site for an alien ship. Unfortunately for UFO enthusiasts, experts say that the rare winter phenomenon is a natural occurrence....

Coral reefs are some of the most diverse and vital ecosystems on Earth. The colorful underwater colonies of coral polyps, held together by calcium carbonate, provide homes for many marine plants and animals and help keep the ocean's nitrogen levels balanced. But while scientists are aware of where the world’s reef systems are located, there is no complete record of all the different types of coral that live there. Now, NASA researchers are hoping to entice nature lovers, both experts and amateurs, to help them create a comprehensive database of these all-important ecosystems by playing a fun, interactive video game!...

The eyes of Leonardo da Vinci’s iconic Mona Lisa have long been thought to follow viewers around the gallery of the Louvre Museum in Paris where it is exhibited, as well as those looking at photographs and reproductions of the famous painting. Now, researchers from Germany's Bielefeld University assert that while “The Mona Lisa Effect,” – the impression that the eyes of the subject in a portrait are following the viewer – is real, it is not true for its namesake painting....

Happy 2019! As is the tradition each year, at the stroke of midnight on December 31st, 2018, cities and towns worldwide ushered in the new year with elaborate fireworks displays. Here are a few that we thought were particularly noteworthy....

Though we are treated to several meteor showers throughout the year, most pale in comparision to the grand finale – the Geminids. Expected to be at their peak on Thursday and Friday night (Dec. 13-14, 2018), the dependable meteors rank high in both quantity and quality. Nicknamed the “900-pound gorilla of meteor showers” by NASA, they outweigh other dust streams by factors of between 5 to 500!...

With less than two weeks left until Christmas, cities and towns across the world are aglow with stunning light displays. Though each is special in its own way, some are truly outstanding. Here are a few that made our list of 2018’s most noteworthy....

Dolphins have been known to demonstrate many human-like behavioral traits. These include forming complex relationships to accomplish common goals, teaching one another survival skills, and even “babysitting” each other's kids. Now, some researchers at the Dolphin Plus Marine Mammal Responder in Key Largo, Florida have discovered another thing the intelligent mammals share with humans – a love for television!...

Most dog owners are convinced that their four-legged friends know exactly what they mean when they use certain words like sit, stay, or treat. However, researchers have always wondered whether canines really understand human speech or if they rely on other clues to deduce the meaning. For example, does the word “fetch” conjure up an image of a stick or ball in the dog’s mind, or does the pooch retrieve the object based on cues such as the owner’s tone or gesture? A new study by scientists at Atlanta’s Emory University seems to indicate that “man’s best friend” is not faking it – he/she does indeed know what the owner is saying....