مقالات علمية

Exposure to microgravity can wreak havoc on the human body. Hence, before astronauts can embark on the long trip to the Moon or Mars, scientists need to find ways to mitigate the physical impacts of space travel....

Scientists have long theorized that older stars swell up as they age and devour nearby planets. However, the assumption has been derived from observations made before and after the event. Now, for the first time, astronomers have caught a star in the act of engulfing a planet. The star, known as ZTF SLRN-2020, resides approximately 12,000 light-years away in our galaxy near the Aquila constellation....

When Suzy Kop entered her father's bedroom on May 8, 2023, she was stunned to find a grapefruit-sized rock next to a big dent on the wooden floor. Upon further investigation, the New Jersey resident saw two holes in the ceiling. It appeared that the stone had struck the floor with such great force that it rebounded and punched a second hole before landing back....

To the untrained eye, the spotted lanternfly (Lycorma delicatula) may look like a beautiful butterfly. The insect's front wings are light brown with black spots, while its hind wings have contrasting patches of red and black with a white band in between. However, the spotted lanternfly is a pest that feasts on and damages crops. It poses a serious threat to farmers across America....

On April 25, 2023, Mattel unveiled the latest addition to their Barbie Fashionistas collection — a doll with Down syndrome. The world's largest toy maker hopes it will allow more children to connect with Barbie....

In early March 2023, Murphy, a bald eagle at the World Bird Sanctuary in Valley Park, Missouri, began to spend his entire day sitting on a makeshift nest inside his aviary. The behavior was not unusual in itself. Male bald eagles always help females during the incubation process. However, in this case, the 31-year-old bird was trying to hatch a rock!...

Black holes have incredibly powerful gravitational pulls. They usually gobble up everything around them. However, for the first time ever, scientists have found a black hole that is creating millions of stars as it zips through space....

Over the years, scientists have used 3D printers for various products. They include electronic devices, jewelry and even artificial organs. Now, mechanical engineers from New York's Columbia University have unveiled a 3D-printed cheesecake made with seven ingredients. This is the most number of items ever used to print a single food product....

This year's eclipse season will begin with a bang with a hybrid solar eclipse on April 20, 2023. The rare astronomical event occurs just once every decade. The last one was on November 3, 2013, and the next one will not be until November 30, 2031. Unfortunately, the celestial phenomenon will only be seen in western Australia, East Timor, and eastern Indonesia....

An international team of researchers has found the fossilized remains of the largest-known penguin on Earth. The newfound species is thought to have weighed about 340 pounds (154 kg). This is over three times heavier than the largest living species, the emperor penguin. The record previously belonged to a 256-pound (116 kg) penguin that lived in Antarctica about 37 million years ago....

The fruit fly larva is no more than 10 mm long. Hence, it would be reasonable to assume that its brain, which is smaller than a poppy seed, is fairly simple. However, a recently-unveiled map of the insect's brain shows a surprisingly complex structure. It has 3,016 neurons connected by 548,000 synapses....

Dr. Joseph Dituri is on a mission to spend 100 days underwater. If successful, the University of South Florida (USF) associate professor will set a new record for undersea living. The record is a nice bonus. But the researcher is mainly doing it for science....

The recent discovery of the oldest-known vertebrate brain is giving scientists valuable insights into the evolution of the ray-finned fish species. The diverse group comprises about 50 percent of living vertebrate species. They include everything from trout to salmon and goldfish to seahorses....

A holiday celebrating a math constant may not seem very exciting. But Pi ("π") Day, observed annually in the US on March 14 (3/14), is an exception. The celebrations usually start with math activities centered around pi — the ratio of the circumference of a circle to its diameter — widely recognized as 3.14. But they typically end with a slice or two of delicious pie!...

Malaria is a life-threatening disease caused by parasites. It is transmitted to humans through the bites of infected female mosquitoes. Malaria can be found in most tropical and subtropical climates. But Africa is the most affected for a number of reasons. In 2021, 619,000 people died of malaria worldwide. Most were young children in sub-Saharan Africa. However, there is hope. Two recently-approved vaccines may provide some protection against this deadly disease....

The health impacts of outdoor air pollution are well-known. But indoor air pollution, caused by emissions from building materials or even air fresheners, can be just as harmful. Yet, there are no widely-accepted methods to detect the toxins. But researchers at the University of Turku in Finland hope to change that with the help of tiny glowing worms....

Colossal Biosciences is on a quest to bring back extinct animal species. In the past year and a half, the company has announced plans to recreate the woolly mammoth and the Tasmanian tiger. On February 2, 2023, the Texas-based startup added the dodo bird to its de-extinction list. If successful, these efforts could open the door to a new era of biodiversity....

An international team of scientists has created a robot that seamlessly goes from a solid to a liquid state and back again. The feat may sound magical. But it is rooted in science....

Nine-year-old Molly Sampson and her 17-year-old sister Natalie had only one item on their Christmas list last year. They wanted chest-high waterproof overalls to "go shark's-tooth hunting like professionals." Their wish was granted. On Christmas morning, the sisters set out to Maryland's Calvert Beach with their father to put their new equipment to use....

Starting January 12, 2023, stargazers will get a once-in-a-lifetime chance to see a rare comet with a greenish hue. Astronomers discovered Comet C/2022 E3 (ZTF) in March 2022 when it was inside Jupiter's orbit. NASA scientists believe this may be the comet's first sighting. If the icy body did pass our planet previously, it was probably thousands of years ago....

Octopuses are among the smartest animals in the ocean. The invertebrates can navigate through mazes, complete tasks in exchange for food, and even recognize human faces. Now, the clever animals have been caught throwing objects at one another. The rare behavior has previously been seen in only a few animals like chimpanzees, elephants, and birds....

With a large part of the US currently under a winter storm warning, it may appear that the chilly season is upon us. But while meteorologists consider December 1 the start of the Northern Hemisphere winter, the astronomical first day of winter is December 21....

Sky watchers are treated to over thirty meteor showers throughout the year. However, most pale in comparison to the Geminids. Nicknamed the "900-pound gorilla of meteor showers" by NASA, they outweigh other dust streams by factors of between 5 to 500! The "shooting stars" have been active since December 4 and will continue until December 17, 2022. But their best showing will be on the night of December 13 into the morning of December 14, 2022, when up to 120 meteors will be flying through the sky every hour....

The Tyrannosaurus rex (T. rex) was one of the most ferocious dinosaurs that roamed Earth in the very late Cretaceous period — about 66 million years ago. Over the years, scientists have collected substantial information on the tiny-armed reptile itself. However, very little is known about how the vicious predator evolved. Now paleontologists at the Badlands Dinosaur Museum in North Dakota believe they may have found an essential missing link to the T. rex's lineage....