مستوى عالي

Endemic to the forests of south and southeast Asia, the silver-backed chevrotain, or Vietnamese mouse-deer, is one of the world's most elusive animals. The rabbit-sized critter is only known to science through five specimens, four of which were recorded by researchers in 1910. The fifth was killed by a hunter and donated to scientists in 1990. Since then, there have been no recorded sightings of the animals, leading many to fear they had gone extinct. Now, thanks to the efforts and persistence of a team led by biologist Andrew Tilker, the species has not only been rediscovered but also photographed in the wild for the first time!...

Unlike early space travelers, who had to consume mysterious powders, purees, and freeze-dried cubes, today's astronauts enjoy a variety of freeze-dried meals, snacks, and desserts that can be commonly found on Earth. However, delicious as the cuisine is, it pales in comparison to a freshly-cooked meal. Though the ability to cook an entire spread in space may take a few years, astronauts at the International Space Station (ISS) may soon be able to enjoy freshly-baked cookies, thanks to a newly-acquired space oven....

Most male birds try to attract mates with elegant gestures. Seabirds bob their heads and flutter their wings, while peacocks fan out their beautiful feathers. However, the white bellbird, endemic to the Amazon rainforest in Brazil, dispenses with the pleasantries and cut to the chase by shrieking in its prospective "date's" face at a deafening 125 decibels (Db)— the loudest bird call ever recorded. To put it in perspective, that is 40 Db higher than the safe hearing range for humans! Prior to this, the honor belonged to another Amazon-dweller — the aptly-named screaming piha — which has a peak recorded "song" volume of 116 Db....

Antibiotics — medications that destroy or slow down bacteria growth — are becoming increasingly less effective as the pathogens find new ways to evade the drugs. Some produce pumps that flush the antibacterial medicines out from the bacterial cell, while others modify themselves, so they are unrecognizable as targets. Now, researchers at UK's Newcastle University have recorded the germs shedding their outer skins and changing their shapes to avoid detection....

Always wanted to meet a real-life superhero? Then you are in luck for November 11 is Veterans Day, an opportunity to thank the brave men and women of the United States Armed Forces, who often risk their lives to protect our freedom. This includes all those who have served in the US Army, Navy, Marine Corps, National Guard, Air Force, and the Coast Guard....

California's relatively calm fire season ended in mid-October with several simultaneous blazes that have since scorched thousands of acres and destroyed hundreds of structures. The largest fire, the Kincade Fire, has burned through 80,000 acres and obliterated 370 structures, including 141 homes, in Northern California since October 25, 2019. In Southern California, the Maria Fire, which broke out in Santa Paula, Ventura County, shortly after 6 p.m. on October 31, 2019, has chewed through 10,000 acres and threatened the area's tens of millions of dollars' worth of avocado and lemon crops....

On October 20, 2019, Wing, a subsidiary of American multinational conglomerate Alphabet Inc., began the most advanced trials of commercial drone delivery in the US yet in Christiansburg, Virginia. Residents can now use a smartphone app to order items from Wing partners such as pharmacy giant Walgreens and local specialty chocolate and popcorn retailer Sugar Magnolia. A Wing drone will pick up the order and gently lower the package with the help of a tether outside the customer's door within an hour!...

On Sunday, November 3, 2019, most North Americans will mark the end of Daylight Saving Time (DST) by moving their clocks back an hour. This simple action will not only add an extra 60 minutes to their weekend, but also shift daylight back into the morning hours, making it a little less painful to wake up for school and work during the shorter winter days....

Humpback whales spend summers feeding in the cold Arctic and Antarctic waters and then migrate to tropical waters during the winters to breed and give birth. Since they don't eat at all during this time, the mammals have to ensure they have enough fat reserves to feed their calves and to sustain themselves. To optimize their prey consumption, humpback whales often create circular "nets" with bubbles exhaled from their blowholes. Now, for the first time, researchers have captured detailed footage of the so-called bubble-net fishing technique from the whale’s point of view along with, an aerial video....

Though there are more than 100 Indian festivals observed annually, few are as anticipated or as popular as Diwali. Also known as Deepavali, or the Festival of Lights, the five-day celebration extends across many cultures and beliefs and is commemorated by almost a billion people worldwide. Though Diwali always falls between October and November, the festival's exact date changes in accordance with the Hindu lunar calendar....

Kenya's Eliud Kipchoge has been dominating the world marathon stage since winning the Chicago Marathon in 2014. In the years following, the elite runner has won every marathon he has participated in, including the gold medal at the 2016 Summer Olympics. In 2018, Kipchoge made history when he crossed the finish line of the Berlin Marathon in 2:01:39, crushing the existing men's world record by a minute and 18 seconds. On October 12, 2019, the 34-year-old further cemented his legacy by running the 26.2 miles in Vienna, Austria in less than two hours, faster than any other person in history. His time of 1:59:40 required him to maintain an average pace of about 4:35 per mile!...

Japan, which gets hit by an average of three typhoons annually, is no stranger to the powerful tropical storms. However, Typhoon Hagibis, which made landfall in the Shizuoka Prefecture at about 7:00 pm local time on October 12, 2019, is the worst storm experienced by the island nation in almost 60 years. Dropping as much as 35 inches of rain in some areas, it caused massive landslides, flooded rivers, and damaged homes and businesses in eight of Japan's 47 prefectures....

Any doubt that Simone Biles is one of the greatest athletes of all time was laid to rest at the 49th FIG Artistic Gymnastics World Championships in Stuttgart, Germany. The 22-year-old dominated the competition, which took place from October 4 to October 13, 2019, winning gold in five of her six events. Biles' career total of 25 medals, 19 of which are gold, now exceed Belarus gymnast Vitaly Scherbo's 23 medals, making Biles the most decorated gymnast — male or female — at the World Championships....

In 1893, Arctic explorer Fridtjof Nansen deliberately lodged his wooden ship in the sea ice north of Siberia, hoping that its natural drift would take him to the North Pole. Though the Norwegian scientist failed to reach his desired destination, his three-year-long, 2,000-kilometer journey into the North Atlantic Ocean revealed important data about the then-mysterious Arctic Ocean. Now, an international team of researchers have embarked on a similar journey for a groundbreaking climate change study of the Arctic....

Mini robots that can roll, fly, float, swim, and even come together to morph into a single machine, may seem like something straight out of a science fiction movie. However, if a team of NASA scientists has its way, the self-assembling Shapeshifter may soon be exploring treacherous distant worlds in search of alien life....

Boyan Slat has been dreaming of cleaning up the world's oceans ever since he was a teenager. On October 2, 2019, the now 25-year-old announced that System 001/B, an autonomous retrieval system developed by his non-profit Ocean Cleanup, had successfully trapped plastic debris floating in the Great Pacific Garbage Patch. Located between Hawaii and California, the approximately 617,763 square-mile mass of waste is the largest accumulation of ocean plastic in the world....

Sleep, considered a luxury by many, is essential for a person's wellbeing. Researchers have found that insufficient sleep increases a person's risk of developing severe medical conditions, such as obesity, diabetes, and cardiovascular disease. Now, a new study by Boston's Massachusetts Institute of Technology (MIT) has found that getting sufficient sleep is also the key to improving academic performance....

Astronomers have long suspected that celestial bodies from other solar systems traverse through ours frequently. However, it is only recently that they have been able to identify some of these interstellar objects. The first, a remarkably fast-moving comet dubbed 'Oumuamua, was already making its way back home by the time it was spotted in October 2017, giving scientists little chance to study it in detail. Now, thanks to the sharp eyes of an amateur astronomer in Crimea, scientists will get a second chance to investigate similar comets with C/2019 Q4 (Borisov), which is currently making its way to our solar system....

On September 24, 2019, Nancy Pelosi, the Speaker of the US House of Representatives (House), launched a formal impeachment inquiry into President Donald Trump. The investigation was triggered by allegations that Mr. Trump had asked Ukrainian President Volodymyr Zelensky to look into the business ties of 2020 Democratic presidential candidate Joe Biden's son, Hunter. Allegedly, in order to persuade Zelensky to agree, the US president withheld federal military aid from Ukraine. So how will the impeachment process work, and what are its potential long-term implications for the president? Read on . . ....

Shipworms, which munch through wood and help release essential nutrient stored within it, are incredibly beneficial for other marine animals. However, the saltwater bivalve mollusks have been known to sink boats and cause extensive damage to docks, piers, and other wooden structures. Now, researchers have uncovered a shipworm species of a different kind — one that has the potential to change the course of a river by gnawing through its limestone bedrock!...

With self-driving vehicle technology rapidly advancing, many companies are turning to autonomous robots for the final leg — the so-called last mile — of the delivery process, from the store or local distribution center to the customer. The latest to join the trend is e-commerce giant Amazon. Following a successful eight-month test run in Snohomish County, Washington, the company's Scout robots have been making the rounds of Irvine, California, since August 6, 2019....

Princess Louisa Inlet, a fjord located 60 miles from Vancouver, Canada, is a spectacular stretch of remote wilderness. Accessible only by boat or plane, the 3.7-mile-long (6-kilometers) area is popular with outdoor enthusiasts who flock to admire the 120-foot-high Chatterbox Falls or to hike the numerous trails to other scenic features. Its dense forests are home to a wide variety of wildlife, including grizzly bears, mountain goats, and eagles. Now, thanks to an unprecedented crowdfunding campaign, the pristine land will be preserved forever for future generations to enjoy....

When the curators at the National Gallery in London, England, applied imaging technology to Leonardo da Vinci's famous painting, The Virgin of the Rocks, they fully expected to see a sketch underneath. What they had not anticipated, however, was a drawing that was substantially different from the final masterpiece....

Swimming across the English Channel — the 21-mile-long body of water separating southern England from northern France — is no easy feat. In addition to the strong ocean currents, swimmers also have to endure temperatures that can range from a chilly 64 degrees Fahrenheit (18 degrees Celsius) to a near-freezing 42 degrees Fahrenheit (6 degrees Celsius). However, don't tell that to Sarah Thomas. The 37-year-old American recently became the first person ever to swim across the length of the treacherous stretch of water, which links the southern part of the North Sea to the Atlantic Ocean, not once, but four times non-stop!...