Astronomers set up center to counter threat of satellite swarms | Science

Three years ago, astronomers were reeling from the launch of the first 60 satellites of SpaceX’s Starlink constellation, which aims to provide broadband internet access worldwide. The satellites left bright traces on astronomical images, posing “an existential threat to observation from the ground,” said astronomer Debra Elmegreen, president of the International Astronomical Union (IAU), at … Read more

A coronavirus variant once helped the global pork industry. Could one protect us? | Science

Long before COVID-19 became a household word—in 1946, to be precise—veterinary researchers at Purdue University reported that something invading the guts of young pigs was causing diarrhea, vomiting, and weight loss, ultimately killing most of them. The scientists did not know the cause of the sickness, which devastated U.S. pig farms, but they could trigger … Read more

Synthetic Enamel Could Make Teeth Stronger and Smarter

Enamel, the tough outer covering of a tooth, is the hardest substance in the human body. It is also notoriously difficult to replicate artificially. Throughout history, dentists have repaired damaged and decayed teeth with everything from beeswax to mercury composites to modern ceramic- or resin-based materials. But they might soon have a synthetic option that … Read more

Purple space ‘lightning’ spews from stellar corpse, creating cosmic shock waves (photo, video)

A streak of purple “lightning” sprawls across the cosmos in a gorgeous new image from NASA. Light and energy twist and turn in an explosive relationship between a stellar corpse known as a white dwarf and a variable red giant star called R Aquarii (R Aqr) orbiting each other out in space. NASA’s Chandra X-ray … Read more

‘Moonfall’ director Roland Emmerich talks disaster, destruction and the inspiration for his moon-crashing new film (video)

The latest amazing, action-packed apocalyptic movie from the master of mayhem, the captain of calamity, Roland Emmerich is about to hit the big screen. In the movie “Moonfall” — which arrives in theaters across the U.S. on Friday (Feb. 4) — for reasons unknown, Earth’s only natural satellite is on a collision course with our … Read more

The chances of early life on Mars faced a meteorite problem

Early chances for life on Mars might have been diminished by meteorites. A new study suggests that a period of heavy cratering on the Red Planet (and elsewhere in the solar system) persisted 30 million years longer than thought. Studies of the Late Heavy Bombardment, as this period is called, also has implications for the … Read more

New Charging Technique Puts Crumbling Batteries Back Together

For electric cars to run as long as possible between charges, their batteries need to pack a punch. One option would be lithium-metal batteries, which have a key component made of this energy-dense element. This gives them greater storage capacity than widely used lithium-ion batteries, in which the same component is made from graphite. Although … Read more

Long-Term Cannabis Smoking Appears to Alter Lung Function, But Not Like Tobacco

A long-term study tracking just over a thousand participants has found regular cannabis smoking can change the function of your lungs as you age. Unlike smoking a cigarette, however, cannabis seems to impact a person’s breathing in a slightly different way.    Over adulthood, tobacco smoking is associated with a progressive decline in how much air … Read more

Breathtaking New Chandra Pics Show Cosmic Objects Like You’ve Never Seen Them Before

Human vision may be limited to a specific range of wavelengths, but that doesn’t mean we’ll never understand the full complexity of light in our Universe. Instruments can peer into the cosmos in regimes that are otherwise invisible to our eyes, showing us not just the dynamics of the stars, but their absolutely awe-inspiring beauty. … Read more