Killer whales, or orcas, are the largest members of the oceanic dolphin family. While the intelligent mammals, which hunt in large pods, are known for their orchestrated attacks on unsuspecting marine animals, they have never posed a threat to humans. However, since late July, the normally social animals have been intentionally attacking sailboats off the coasts of Spain and Portugal. The unusual hostility is puzzling scientists worldwide....

In a normal world, boarding an airplane that circles in the air for a few hours before returning to the same airport would have been considered laughable. However, in the COVID-19 pandemic era, where international travel has ground to a halt, "flights to nowhere," or "scenic flights," are becoming increasingly popular with homebound consumers eager to get on an airplane....

Researchers have long been aware of the presence of rust, or hematite, on Mars caused by the chemical reaction between the iron ore on the planet's surface and water and oxygen from the ancient past. However, they had never expected to find the reddish-brown iron oxide on the Moon, given that our satellite is missing two of the three key components — moisture and oxygen. Now, a new study, based on recent data from India's Chandrayaan-1 Moon-orbiting spacecraft, suggests that the Moon is displaying signs of rust and it may be Earth's fault....

When the United States formally entered World War II — the six-year-long global conflict that began in 1939 with Nazi Germany's attack on Poland — in 1941, millions of brave Americans helped to fight for the cause. Among them was New Orleans resident Lawrence Brooks, who served the country for five years as a soldier in the US Army's 91st Engineer Battalion. Fortunately for us, Brooks, who will celebrate his 111th birthday on September 12, 2020, is still around to share his exciting encounters....

Invented by French teenager Louis Braille in 1824, braille has enabled millions of visually impaired kids worldwide to learn to read and write. However, the system of raised dots, representing individual alphabet and numbers, can be complicated for younger students to grasp. As a result, parents and educators are increasingly shunning the tactile literacy system, which is taught using special textbooks, in favor of online learning programs. Now, Denmark's LEGO Group hopes to reverse the trend with the help of braille bricks that allow children to learn through play....

Marvel fans and movie enthusiasts worldwide are mourning the sudden death of Hollywood star Chadwick Boseman. The 43-year-old actor, best known for his portrayal of T'Challa — the king and protector of the fictional African nation of Wakanda in Black Panther — passed away on August 28, 2020, after a four year battle with colon cancer. The news came as a shock to most people since the intensely private Boseman, who was diagnosed at stage 3 cancer in 2016 — the year King T'Challa debuted in Captain America: Civil War — never spoke publicly about his illness....

Scientists from the University of Texas at Austin have finally solved the mystery of a massive fossil that has been sitting unlabeled and unidentified at a Chilean museum for almost a decade. The relic, which resembles a deflated football, is the largest-known soft-shelled egg from a marine reptile that inhabited Earth over 66 million years ago — about the time of the mass animal extinction event. Measuring more than 11 by 7 inches it is also the second-largest egg belonging to any known animal, behind only the now-extinct elephant bird....

North America's relatively calm summer weather ended last week when a powerful derecho swept across the Midwest — from South Dakota to Ohio — on August 10, 2020, and a rare firenado struck Northern California on August 15, 2020. If you are like most people, you have probably never heard of either of the rare natural phenomena. Here is a brief explanation of the incredible extreme weather events....

Over the years, researchers have made numerous attempts to make Harry Potter's invisibility cloak a reality. While each version has been slightly better, none have come close to the one donned by the young wizard. Now, scientists may be able to get some tips from an unlikely source — ultra-black deep-sea fish that have evolved the capability to hide in plain sight to avoid detection....

SpaceX's first-ever passenger flight to the International Space Station (ISS) ended successfully on August 2, 2020, when Crew Dragon Endeavour splashed into the Gulf of Mexico off the coast of Pensacola, Florida. After a series of safety checks, the recovery teams unlocked the capsule's hatch and quickly whisked the spacecraft's precious cargo — NASA astronauts Bob Behnken and Doug Hurley — to shore. During their total 64 days in space, the astronaut duo completed 1,024 orbits around Earth and traveled 27,147,284 miles....

Male birds typically sing the same tunes as the rest of their species because an unrecognizable song defeats the two primary reasons for their crooning — to establish and defend their territory and to attract mates. While the songs, which are passed down from generation to generation, may vary slightly by region, any new compositions are typically limited to the local environment. However, for reasons unknown to scientists, white-throated sparrows across Canada are abandoning their classic song for a catchy new tune "written" by their peers in British Columbia....

Scattered across the ocean bed, and often hidden from the human eye, are hundreds, or perhaps even thousands, of "blue holes." The massive underwater sinkholes, which host a diverse biological community — ranging from coral to sponges to sharks to sea turtles — were formed thousands of years ago when groundwater dissolved karst, a type of porous limestone rock found on ocean floors....

Even those not normally interested in astronomy will find it hard to resist NEOWISE, the brightest comet to grace our skies since the 1997 appearance of Comet Hale-Bopp. The spectacular cosmic snowball of frozen gas, rock, and dust has been visible to those willing to wake up before dawn since early July. However, it has now risen high in the evening skies and can be viewed with the unaided eye by even the most casual stargazer....

Former US President Ronald Reagan's love for jelly beans, which were a staple offering during his 8-year-term in office, is well-documented. However, the country's 40th head of state also had another guilty pleasure — ice cream, which he described as "[a] nutritious and wholesome food." To give the delicious treat the respect it deserved, on July 9, 1984, Mr. Reagan signed Proclamation 5219, which declared July as National Ice Cream Month!...

June 19, 2020, marks the 155th anniversary of Juneteenth — a mashup of June and nineteenth — the oldest-known celebration commemorating the end of slavery in the United States. It was on this day in 1865 when the last American slaves — a group of people in Texas — finally learned that slavery had been abolished and that they were free....

Identifying the chemical makeup of pigments used in ancient documents, paintings, and watercolors is critical to restoring and conserving the precious artworks. However, despite numerous efforts, scientists had been unable to determine the source of folium, a popular blue dye used to color manuscripts in Europe during the middle ages — from the 5th to the 15th century. Now, a team of researchers from Portugal has finally uncovered the mysterious ingredient responsible for the gorgeous blueish-purple tint that helped bring ancient illustrations and texts to life....

Astronauts aboard the International Space Station (ISS) are always thrilled to welcome new crew members to the orbiting laboratory. However, the May 31, 2020, arrival of NASA astronauts Robert Behnken and Douglas Hurley on SpaceX's Endeavour was particularly exciting. It was the first piloted launch from American soil since the US Space Shuttle program was retired in 2011 and the first human spaceflight performed by a public-private partnership — NASA and SpaceX....

If you are looking for an excuse to indulge in a donut or two, here is a perfect one. Friday, June 5, 2020, is National Donut Day, which means it is your civic duty to devour one — or even a dozen — of the fried treats. Observed annually on the first Friday of June, the yummy holiday was not established by donut manufacturers to boost sales but by Salvation Army volunteers to raise funds for the poor....

The Sahara Desert, which encompasses over 3.6 million square miles of Northern Africa, is one of the harshest and most inhospitable places on the planet today. However, new research conducted by a team of international paleontologists has found that millions of years ago, the area was a lush green oasis filled with a frightening line-up of ferocious carnivores, including flying reptiles, crocodile-like hunters, and aquatic dinosaurs....

The negative health impacts of plastic on both wildlife and humans have been well-documented. However, the versatile material, which is used for everything from grocery bags to drink bottles to food packaging, is hard to avoid. Experts estimate that of the 359 million tons of plastics produced annually worldwide, about 150–200 million tons end up in landfills or the environment. To make matters worse, the material derived from the small percentage of plastic that is recycled is of lower quality and can only be used a few times for items like clothing or carpets before it has to be discarded....

Though considered a waste of time by some, sleep is essential for the health and wellbeing of humans. Over the years, researchers have found sleeping allows the body to repair and restore cells, get rid of irrelevant memories, and even help kids grow taller and obtain better grades. Now, it appears that snoozing for an average of 8 hours daily enables the brain to cleanse itself and get rid of harmful toxins....

When Robert Sullivan, a research associate at the New Mexico Museum of Natural History and Science in Albuquerque, found some dinosaur bones in 67-million year-old Cretaceous rocks in New Mexico's San Juan Basin, in 2008, he had little idea they belonged to a new raptor species. More significantly, the feathered dinosaur roamed southern North America just prior to the mass extinction event, when most raptors had already disappeared from the fossil record....

Earth Day, which is celebrated annually on April 22, is usually commemorated with outdoor activities demonstrating support for environmental protection. These include planting trees, collecting roadside or beach trash, and conducting, or participating in, recycling and conservation programs....

The orbital spacecrafts, landers, and rovers sent to Mars under NASA's Mars Exploration Program (MEP) have provided invaluable insights into the red planet's topography, climate, and natural resources. However, finding any evidence of life has proved elusive. Now, the discovery of microbial growth found inside ancient, cold oceanic crust in the middle of the South Pacific is giving scientists hope that the proof may already be with us — we just need to know where to look!...