مستوى متوسط

Black History Month, celebrated every February, commemorates the many, often overlooked, contributions African Americans have made to society. American historian Dr. Carter G. Woodson came up with the idea in 1926 as a way to share his love for Black history with students. Today, African American History Month, as it is also called, is one of the most celebrated cultural heritage months on the American calendar....

The Hunga Tonga-Hunga Ha'apai — an underwater volcano located 40 miles (65km) north of Nuku'alofa, the capital of the Kingdom of Tonga — has erupted a couple of times over the past few decades. However, its January 15, 2022, explosion was like none other seen on Earth in over 30 years. The spectacular 13-mile-wide eruption, with a sonic boom heard 6,000 miles away in Alaska, spewed large plumes of ash and gases as high as 19 miles. The massive waves that followed triggered tsunami warnings in Peru, New Zealand, Japan, and the US West Coast....

Researchers have long suspected that Mars was once home to several rivers, lakes, and perhaps even oceans. But while they have been able to detect ice, and some salty lakes, in the planet's polar regions, finding water in other areas has proved elusive. Now, scientists have finally found evidence of a large water reservoir just a few feet below the surface of the Red Planet's Valles Marineris canyon system....

The XXIV Olympic Winter Games will officially start with a grand opening ceremony at the National Stadium in Beijing, China, on February 4, 2022. The two-week-long sporting extravaganza, which ends on February 20, 2022, will feature a record 109 competitions over 15 disciplines in seven sports. Among them will be seven new exciting events. Here is a brief preview of each....

The James Webb Space Telescope (Webb) — the world's largest and most complex science telescope — was successfully launched into space atop a European Ariane 5 rocket on December 25, 2021. The $10 billion revolutionary space observatory — a joint effort between NASA, the European Space Agency, and the Canadian Space Agency — is designed to detect the faint infrared light from the earliest stars and galaxies formed over 13.5 billion years ago....

Martin Luther King Day, which will be observed on January 17, 2022, is about more than honoring the legacy of the American civil rights activist. It is the only US federal holiday designated as a national day of service — a "day on, not a day off." Americans are encouraged to celebrate the occasion by participating in service activities to help their local communities....

On December 31, 2021, the world happily bid farewell to yet another year of COVID uncertainties and welcomed 2022 with high hopes. The celebrations were scaled back, or in some cases even canceled, due to the rapid spread of the new coronavirus variant, Omicron. However, the variant's milder symptoms and lower fatality rates has renewed optimism that the pandemic would soon be behind us. Here are some of this year's most spectacular fireworks displays from around the world....

For most Americans, Santa Claus is a jolly, white-haired man in a red suit. However, that is just one depiction of the generous being that brings toys to well-behaved children on Christmas Eve. Other countries have their own versions of Santa Claus who, in some cases, do not even appear during Christmas! Here are a few of the many portrayals of Santa-like figures from around the world....

To a casual observer, the artwork in the image above may appear to be the scribbles of a toddler or — as is the case here — orangutans. However, a new study by French scientists has found that the seemingly random patterns showcase the primate artists' distinct style and ability, and possibly even state of mind....

On Tuesday, December 21, Northern Hemisphere residents will enjoy the shortest day of 2021. Known as the winter solstice, it also marks the start of the astronomical winter season. This means that while the days following will grow longer, they will also be colder. Conversely, Southern Hemisphere residents will celebrate the summer solstice — the beginning of their astronomical summer — with the longest day and shortest night of the year....

A series of deadly tornadoes swept across a large swath of the Midwestern and Southeastern US overnight on December 10, 2021. The National Weather Service (NSW) estimates that the severe storms spawned about 50 twisters across eight states — Arkansas, Indiana, Kentucky, Missouri, Mississippi, Tennessee, Ohio, and Illinois....

Egyptian archaeologists have discovered thousands of ancient structures — and even entire cities. However, finding the six sun temples constructed by the Fifth Dynasty pharaohs has proved elusive. Only two had been found until recently, and the last one was unearthed 50 years ago....

A rare manuscript co-authored by German-American physicist Albert Einstein and Swiss-Italian engineer Michele Besso just became the most expensive autographed scientific paper ever sold. The final price — which added up to more than 13.3 million euros ($15 million) with fees — far exceeded the 3.5 million Euros ($3.9 million) expected by Christie's Auction House Paris office, which hosted the sale....

Kamo'oalewa) (also known as 2016-H03), a small asteroid that orbits the Sun alongside Earth has been known to science since 2016. However, the rock's origins have always remained a mystery to researchers. Now, new observations by University of Arizona (UA) astronomers indicate that the Ferris-wheel-sized space rock may be a piece of our Moon that broke off almost 500 million years ago!...

After months of negotiations, US lawmakers finally reached an agreement to allocate $1.2 trillion to much-needed public works projects. The Infrastructure Investment and Jobs Act, signed into law by President Joe Biden on November 15, 2021, includes $550 billion in new spending. The rest will be reallocated from already existing projects and funds. Here are some of the many infrastructure improvements that can be expected across the country over the next five years....

On November 25, 2021, an estimated 46 million unlucky turkeys will become the centerpieces of Thanksgiving dinner tables across the US. However, two gorgeous white toms — Peanut Butter and Jelly — will not be among them. The lucky birds were pardoned by President Joe Biden in an elaborate ceremony held at the White House Rose Garden on November 19, 2021....

Hanukkah is one of the most widely observed Jewish holidays. The eight-day-long winter festival begins on the 25th day of Kislev, the ninth month of the Jewish calendar. This year, the celebrations will extend from November 28th, 2021, to December 6th, 2021. Also known as the Festival of Lights, Hanukkah celebrates the victory of good over evil and is a happy occasion with many fun traditions....

On November 25, 2021, most Americans will get together with families and friends to celebrate Thanksgiving. The secular holiday, observed annually on the fourth Thursday of November, centers around a delicious feast that typically includes turkey, mashed potatoes, cranberry sauce, and pumpkin pie. Other fun traditions include participating in turkey trots and parades and seeking out "Black Friday" bargains. But not all countries observe the holiday on the same day or follow the same customs. Here are four variations of Thanksgiving celebrations from around the world....

Over the years, astronomers have found many planetary systems with two or even three stars. However, the planets within the systems typically orbited a single star. Now, researchers may have found a gaseous exoplanet that orbits its three suns simultaneously!...

Superheroes come in all shapes and sizes. Sometimes, as is the case here, they even have tails! On Oct 11, 2021, the International Fund for Animal Welfare (IFAW) honored Bear, an Australian Koolie, with the "Animal of the Year" Award. The six-year-old pooch helped save over 100 koalas from the devastating bushfires that swept across New South Wales (NSW), Australia, from June 2019 to May 2020....

Sarah Park has known about the impact of music on the brain since a young age. The 13-year-old, who has been playing violin since she was 4, says she noticed its positive effect on those around her, especially her grandmother, who suffered from a mental health illness....

Walt Disney World's 18-month-long party to celebrate its 50th birthday began amid much fanfare on October 1, 2021. "The World's Most Magical Celebration" — extended across all four theme parks — is being marked with many special events and experiences. Here is a sampling of the many exciting things in store for visitors to the Orlando, Florida, resort....

Every November 11, Americans celebrate Veterans Day. The federal holiday honors the brave men and women of the United States Armed Forces, who frequently risk their lives to protect others. This includes everyone who has served in the US Army, Navy, Marine Corps, National Guard, Air Force, and the Coast Guard. Veterans Day often gets confused with Memorial Day. The former honors all military veterans, including those still with us, while the latter pays tribute to those who died while in service....

Tardigrades, or water bears, are virtually indestructible. The eight-legged microscopic animals can withstand extreme temperatures, survive without food for decades, and even exist in a vacuum in space. But, despite being around for over 500 million years, they rarely appear on the fossil record. Their miniature size and lack of hard tissue make it hard for them to fossilize. Even when they do get preserved, the tiny creatures are hard to spot and often get overlooked. Over the years, only two tardigrade fossils have been found. Now, a third specimen — one of a new tardigrade species — has joined this exclusive group....