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High up on Mount Rainier in Washington, there's a stunning view of the other white-capped peaks in the Cascade Range. But Scott Hotaling is looking down toward his feet, studying the snow-covered ground.

"It's happening," he says, gesturing across Paradise Glacier.

Small black flecks suddenly appear on the previously blank expanse of white. The glacier's surface quickly transforms as more and more tiny black creatures emerge. The ice worms have returned, snaking in between ice crystals and shimmering in the sun.

A black hole swallowing a neutron star — a star more massive than our sun but only about the size of a city — has been observed for the first time ever.

Each of these space monsters is among the most extreme and mysterious phenomena in the universe. The new find, described Tuesday in The Astrophysical Journal Letters, shows how the very fabric of the universe gets roiled when the two come together.

Right now, a couple of planets about as massive as Earth are orbiting a dim star that's just a dozen light-years away from us. Those planets could be cozy enough to potentially support life. But if any one is living there — and if these life forms have the same kinds of technology that humans do — they wouldn't be able to detect Earth yet.

NASA has decided to send two new missions to Venus, our closest planetary neighbor, making it the first time the agency will go to this scorching hot world in more than three decades.

The news has thrilled planetary scientists who have long argued that Venus deserves more attention because it could be a cautionary tale of a pleasant, Earth-like world that somehow went horribly awry.

Traces of rare forms of iron and plutonium have been found at the bottom of the Pacific Ocean, after some kind of cataclysm in outer space created this radioactive stuff and sent it raining down on our planet.

An effort to understand the full genetic makeup of more than 70,000 mammals, birds, reptiles, amphibians and fishes has taken some major steps forward, with scientists unveiling the DNA sequences of 25 species including the Canada lynx, platypus, and zig-zag eel.

Updated April 23, 2021 at 5:24 PM ET

It was 4 o'clock in the morning, well before sunrise, and cold. A light wintry mix of rain and snow was falling. The lousy weather was a relief, as it meant even less of a chance that someone might randomly pass by. The small group of scientists didn't want anyone to see what they were about to do.

More than a billion biological specimens are thought to be stashed away in museums and universities and other places across the United States — everything from dead fish floating in glass jars to dried plants pressed between paper to vials of microbes chilling in a freezer.

Until recently, it's been hard to for researchers to locate all the potentially useful stuff scattered around in storage, even though caretakers say these treasures are like time machines that offer an unrivaled opportunity to understand global change.

Octopuses have alternating periods of "quiet" and "active" sleep that make their rest similar to that of mammals, despite being separated by more than 500 million years of evolution.

During their active periods of sleep, octopuses' skin color changes and their bodies twitch, according to a report in the journal iScience, and they might even have short dreams.

NASA is counting down to what should be the final major test of the massive rocket it is building to put the first woman and the next man on the moon.

Updated at 5:40 p.m.

A panel of experts that advises the Centers for Disease Control and Prevention has given its blessing to a new one-shot vaccine for COVID-19.

Tattoo artists in Europe are fighting a new ban on two commonly-used green and blue pigments, saying that losing these ink ingredients would be a disaster for their industry and their art.

A horn made from a conch shell over 17,000 years ago has blasted out musical notes for the first time in millennia.

Archaeologists originally found the seashell in 1931, in a French cave that contains prehistoric wall paintings. They speculated that the cave's past occupants had used the shell as a ceremonial cup for shared drinks, and that a hole in its tip was just accidental damage.

When two nearly blind naked mole rats encounter each other in a dark subterranean tunnel, it could be a friendly meeting or a moment of potential bloodshed between strangers. The creatures chirp to each other in greeting—and what happens next depends on the exact sound of those chirps.

When Linsey Marr looks back at the beginning of 2020, what strikes her is how few people in the world really understood how viruses can travel through the air.

"In the past year, we've come farther in understanding airborne transmission, or at least kind of beyond just the few experts who study it, than we have in decades," says Marr. "Frankly, I thought it would take us another 30 years to get to where we are now."

A NASA spacecraft sent out to collect a sample of rock and dust from an asteroid has nabbed so much that it's created an unexpected problem.

Rocks are jammed in the device in a way that's keeping a Mylar flap open, creating a gap that's letting some of the collected pebbles and dust drift out into space.

Updated at 7:30 p.m. ET

A NASA spacecraft successfully touched down on a skyscraper-sized asteroid 200 million miles away, in order to collect a small amount of rock and dust that can then be returned to Earth.

The probe, called OSIRIS-REx, is about as big as a 15-passenger van, and it was aiming for a specific spot inside a boulder-strewn crater. The maneuver was tricky and fraught with peril, as the spacecraft had to reach a safe area that's only the size of a few parking spaces.

Last week, craving sweets, Colin Purrington remembered the Twinkies.

He'd purchased them back in 2012 for sentimental reasons when he heard that Hostess Brands was going bankrupt and Twinkies might disappear forever.

"When there's no desserts in the house, you get desperate," says Purrington, who went down to the basement and retrieved the old box of snack cakes, fully intending to enjoy several.

The Nobel Prize in chemistry was awarded this year to Emmanuelle Charpentier and Jennifer Doudna for their work on "genetic scissors" that can cut DNA at a precise location, allowing scientists to make specific changes to specific genes.

Giant flares and eruptions from the sun can cause space weather, and stormy space weather can interfere with everything from satellites to the electrical grid to airplane communications. Now, though, there's good news for people who monitor the phenomenon — the sun has passed from one of its 11-year activity cycles into another, and scientists predict that the new cycle should be just about as calm as the last.

Scientists say they've detected a gas in the clouds of Venus that, on Earth, is produced by microbial life.

The researchers have racked their brains trying to understand why this toxic gas, phosphine, is there in such quantities, but they can't think of any geologic or chemical explanation.

The mystery raises the astonishing possibility that Venus, the planet that comes closest to Earth as it whizzes around the sun, might have some kind of life flourishing more than 30 miles up in its yellow, hazy clouds.

Mike Brown has been using the Hubble Space Telescope pretty consistently for most of the past three decades since it launched in 1990. But recently he had an experience with Hubble that he never had before.

With the annual flu season about to start, it's still unclear exactly how influenza virus will interact with the coronavirus if a person has both viruses.

Water on Earth is omnipresent and essential for life as we know it, and yet scientists remain a bit baffled about where all of this water came from: Was it present when the planet formed, or did the planet form dry and only later get its water from impacts with water-rich objects such as comets?

This year's flu season in the Southern Hemisphere was weirdly mild.

A surprisingly small number of people in the Southern Hemisphere have gotten the flu this year, probably because the public health measures put in place to fight COVID-19 have also limited the spread of influenza.

That makes public health experts hopeful that the U. S. and other northern countries might be spared the double whammy of COVID-19 and a bad flu season this winter.

Still, they warn against complacency and say people still need to get vaccinated against the flu.

When a weather station in Death Valley, Calif., registered an astonishing 130 degrees Fahrenheit this week, it got meteorologists' attention.

After all, there's a possibility that this is the highest such temperature ever reliably recorded on Earth — if it's for real.

Updated at 6:40 p.m. ET

Two NASA astronauts are back on Earth after their space capsule splashed down in the Gulf of Mexico, off the coast of Pensacola, Fla.

The last time any NASA astronauts came home by splashing down was in 1975 — and back then, they were in an Apollo space vehicle. This time, the astronauts were in a white, bell-shaped capsule owned by SpaceX.

The first genetically altered squid has scientists excited about a potential new way to study marine critters that are so weird, they've sometimes been compared to alien life forms.

A mosquito that transmits dangerous viruses like dengue and Zika seems to have developed a taste for human blood because of the way that people store water — which mosquitoes need for laying eggs — in hot, dry climates.

That's according to a new study in Current Biology that tested the biting preferences of Aedes aegypti populations from 27 locations across sub-Saharan Africa, the ancestral home of this mosquito species.

Rats will enthusiastically work to free a rat caught in a trap — and it turns out that they are especially eager to be a good Samaritan when they're in the company of other willing helpers.

But that urge to come to the rescue quickly disappears if a potential hero is surrounded by indifferent rat pals that make no move to assist the unfortunate, trapped rodent.

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