مستوى عالي

In most countries being able to drive is a fundamental right, afforded to anyone that is of legal age. However, this is not the case in Saudi Arabia. In this ultraconservative Islamic nation, women are not allowed to do many things that females worldwide take for granted, including getting behind the wheel. Though there is no official law in place, local authorities consistently turn down license requests from women, effectively resulting in a defacto ban. Those who defy the unwritten rule often end up losing their jobs and even risk getting arrested and jailed....

Unraveled shoelaces are the bane of people worldwide. The pesky knots magically appear to come apart at the most inconvenient times – in the final sprint of a long run or, just before a crucial point in a game. However, while there has been a lot of research conducted on the durability of the various types of knots, nobody has ever investigated the fundamental question – why do laces come undone? Now, thanks to a team of researchers at the University of California, Berkeley, there is finally a scientific explanation to this knotty problem which affects both young and old....

At the beginning of each school year, students rush to their new classrooms to see what exciting surprise is in store for them. Some are greeted with a new class pet, while others encounter a reading nook furnished with comfortable bean bags or couches. This year, Oregon educator Kyle Hubler took the first-day thrill to a whole new level by transforming his classroom into a mini Hogwarts, complete with wands, (fake) owls and costumes!...

Self-driving cars are all the rage today, Companies ranging from car manufacturers like General Motors and Toyota to private-hire companies like Uber and even Internet search giant Google are all scrambling to be the first to bring them to market. The efforts are so intense that the University of Michigan has established an entire city to help the cause. Dubbed Mcity, it allows manufacturers to safely test their autonomous cars using human props....

On September 15, 2017, Cassini’s 19 year, 11 month, 0 day, 3 hour, 12 minute and 46 second long mission ended with a plunge into Saturn, the planet it had been orbiting for 13 years. The fiery demise was not accidental, but the result of a well-orchestrated plan to ensure that the spacecraft, which was running out of rocket propellant would not crash and pollute Saturn’s pristine moons....

The next time your brain refuses to recall a simple fact or name, be thankful. That’s because according to University of Toronto professors Blake Richards and Paul Frankland, could be a sign that your brain is getting rid of unnecessary information so that it can operate more efficiently, and help you make better decisions....

Pedestrian etiquette – things like not walking into oncoming traffic or keeping to the right of the sidewalk – comes naturally to humans. However, while robots have been programmed to accomplish many things, teaching them to navigate among crowds has proved a challenge because it is hard to accurately predict each person’s path. Now, a team of MIT engineers, led by Steven Chen, have overcome the hurdle with a knee-high autonomous machine that can seamlessly weave itself through pedestrians, paving the way for errand-running and pizza delivering robots....

Harvey, Irma, Jose, and Maria — these seemingly innocuous names all belong to powerful hurricanes that have devastated small islands and major US cities in the past few weeks. Maria, a Category 5 storm began its path of destruction by pummeling the Commonwealth of Dominica, a tiny sovereign island country in the Caribbean, on Tuesday, September 18. Two days later, on September 20, the slightly weakened Category 4 hurricane unleashed its wrath on Puerto Rico, which was still reeling from the impacts of Irma....

Given that sharks have been around for millions of years and can live for as long as 400 years, it is evident that the formidable species has developed an arsenal of survival mechanisms. However, a lemon shark’s two-year quest to rid itself of a piece of ingested stainless steel through its skin, and self-heal Wolverine style, has impressed even the most jaded scientists....

Every year on September 19, residents of Mexico City conduct an emergency evacuation drill to mark the anniversary of an 8.0 magnitude earthquake that killed about 10,000 residents in 1985. Yesterday was no exception. At 11:00 am, thousands of people left their homes, offices, and shops and made their way to the predesignated safe zones. Little did they know that within just two hours, the evacuation warning bells would ring again. Only this time, they were instantly followed by the violent shaking of a 7.1 magnitude earthquake....

A week ago, on Tuesday, September 12, Apple unveiled its latest offerings to eagerly awaiting fans. The 2017 product showcase held at Apple Park, the company’s new “spaceship” headquarters in Cupertino, CA, included an upgraded Apple Watch, 4K Apple TV, as well as the next generation iPhones – 8 and 8 plus. Just as the presentation appeared to be drawing to a close, company CEO Tim Cook, took to the podium mouthing the late Steve Job’s familiar, “one more thing . . .” phrase, before introducing the much-anticipated iPhone X (“ten”)....

Male humpback whales are well-known for the long sweet melodies they sing during the breeding season. The soulful songs that last anywhere from ten to twenty minutes, are not random noises, but carefully orchestrated themes that keep repeating and developing. Scientists are not sure if the mammals sing to attract partners or to deter rivals but once they get going, they tend to repeat the same tune over and over, for long periods of time....

Just days after Hurricane Harvey struck Texas and parts of Louisiana, leaving behind unprecedented destruction, an even stronger tropical cyclone was reported heading towards Florida. Irma, the most powerful Atlantic Ocean hurricane in recorded history, first brought chaos to the Caribbean, devastating islands like Barbuda and St. Martin on September 6, where it struck with Category 5 winds that at times reached up to 185 mph....

Though it has been 16 years, Americans who lived through the September 11, 2001 terrorist attacks remember the events of the tragic day vividly. Early that morning, 19 members of the Islamic extremist organization Al Qaeda, split into four teams, each with an experienced pilot, and hijacked four commercial flights — United Flight 93 from New Jersey, American Flight 77 from Washington DC, as well as United Flight 175 and American Flight 11 from Boston....

On Tuesday, September 5, U.S. Attorney General Jeff Sessions announced that the Deferred Action for Childhood Arrivals (DACA) program will be terminated in six months and urged the U.S. Congress to pass replacement legislation before March 2018. The program, the result of a 2012 executive order by former President Barack Obama, shields young undocumented immigrants from deportation....

Scientists have long known that the world’s first flower bloomed between 250 million and 140 million years ago, during the Cretaceous period when dinosaurs dominated the earth. The single mutation was so successful that flowering plants, or Angiosperms, now make up almost 90% of all plant species, far outnumbering seed plants like conifers, that appeared on earth much earlier, between 350 million and 310 million years ago....

On Friday, August 25, Hurricane Harvey made landfall in Southern Texas as a Category 4 storm, leaving in its wake unprecedented damage and chaos. To make matters worse, the storm lingered around for days, dumping almost 52-inches of rain, breaking a 50-year record for tropical cyclone rainfall measured in a single place in the US....

Over a 100 million years ago, an 18-foot (5.48 meter) long, 2,500-pound (1,133 kg) pineapple-shaped dinosaur met an untimely death when it was swept away by a river in what is now Alberta, Canada. Fortunately for us, its body ended up situated back-first on the muddy floor of an old seaway. This helped preserve the ancient behemoth’s front half in such extraordinary 3-D detail that the armored dinosaur almost looks alive....

Utrecht, the fourth largest city in the Netherlands, is a cyclist’s dream. Unlike other urban areas that confine riders to tiny lanes, cyclists here get priority with dedicated “bicycle streets,” where cars are considered “guests,” as well as special bike tunnels and bridges. The city is also in the process of constructing the world’s biggest indoor parking lot for bikes at its central train station. However, the over 60 percent residents who use the two-wheelers as their primary mode of transportation are still frustrated because, like cyclists all over the world, they have to make constant stops at traffic lights....

You might not think of plants as particularly chatty but in reality, they communicate surprisingly well with each other, especially when faced with danger. According to a recent study in the journal Frontiers in Plant Science injured plants send out emergency signals to alert neighbors to start building up their defenses....

While Japan is known to have higher than average rates of stomach cancer, the residents of the town of Kaneyama in Yamagata Prefecture appear to be particularly susceptible to the gastric ailment. After a recent report revealed that the municipality had one of the highest stomach cancer fatality rates out of the nation’s 344 “secondary medical districts”, the town officials decided to get its 6,000 residents tested....

The total solar eclipse on August 21, 2017, is the first of its kind to go coast-to-coast across the continental United States in nearly a century. While the partial eclipse will start earlier and end later, the total eclipse will travel from Oregon to South Carolina in a speedy 93 minutes. Its narrow, 70-mile-wide, path of totality will begin at Lincoln Beach, OR at 10:15 a.m PDT (1:15 p.m. EDT) and continue through Idaho, Wyoming, Montana, Nebraska, Iowa, Kansas, Missouri, Illinois, Kentucky, Tennessee, Georgia and North Carolina, before ending in Charleston, SC at 11:48 a.m. PDT (2:48 p.m. EDT)....

Sometime between July 10 and 12, a massive iceberg the size of the US state of Delaware broke free from Antarctica’s Larsen C Ice Shelf. The crack that led to the separation was visible in the first images of the ice shelf captured by NASA satellites in 1963. However, the rift remained dormant for decades, before suddenly spreading northwards and widening by 18 miles between 2011 and 2015 and then an additional 13 miles in 2016. As of last month, the iceberg, named A-68 by the US National Ice Center, was hanging by a thread and experts knew it was just a matter of time before it broke free....

Worms are not the first thing that come to mind when one thinks of space travelers. However, that is exactly what the researchers from Tufts University decided to send to the International Space Station (ISS) on January 10, 2015. Some were left whole, others had their head or tail sliced off, while a few poor souls went to space with neither head nor tail! The group of planarian flatworms (Dugesia japonica) selected for their ability to regenerate any body part, were in varying states. Some were left whole, others had their head or tail sliced off, while a select few were shipped with neither head nor tail!...