How Old Are Saturn’s Rings?

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A recently captured view of Saturn’s rings shows them glowing brightly on June 20, 2019. Hubble took this stunning shot as part of the Outer Planets Atmospheres Legacy (OPAL) project. (Credit: NASA, ESA, A. Simon (GSFC), M.H. Wong (University of California, Berkeley) and the OPAL Team) Saturn’s rings are one of the most striking celestial features in our solar system. The Pioneer and Voyager probes gave us our first close-up look. More recently, NASA’s Cassini mission spent ...read more

Low on Juice: How Phone Batteries Shape the Rhythms of Our Daily Lives

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Feeling stressed yet? (Credit: boyhey/Shutterstock) It's happened to all of us. You're out and about when you notice that your phone is running low on battery. For many, the realization sparks a sense of urgency, and lends new meaning to plans we may have already laid. Edging that battery icon back up becomes a goal of singular urgency, a task that lends a frisson of unease to our everyday lives. At least, that's what two researchers in Europe found when they surveyed a small group of Lon ...read more

Human Hearts Evolved for Endurance — and They Need It to Stay Healthy

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(Credit: lzf/Shutterstock) (Inside Science) -- Millions of years ago, after the ancestors of humans diverged from the last link they shared with chimpanzees, they began developing the numerous adaptations that made endurance one of the defining traits of our species. By about 2 million years ago, the genus Homo had emerged and the process really took off. Today, humans can run for miles or walk all day thanks to those changes. In new research, scientists have shown just how substant ...read more

Hubble Spots a Dim, Dark Matter-Rich Galaxy

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(Credit: ESA/Hubble & NASA, D. Calzetti) Some 30 million light-years from Earth, a faint monster lurks in the constellation Cetus the Whale. Astronomers dub the object UGC 695, and astronomers recently caught this image of it using the Hubble Space Telescope. It’s a galaxy fainter than even the background brightness of our planet’s atmosphere, which makes it tough to see with Earth-bound telescopes. These so-called “low-surface-brightness galaxies” get thei ...read more

Giant Volcano on Jupiter’s Moon Could Erupt Any Second

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A true color approximation of Jupiter's moon Io taken by the Galileo spacecraft in 1999. (credit: PIRL/University of Arizona) A volcano spread across an area greater than Lake Michigan could erupt any day. Located on Jupiter’s moon Io scientists predict that Loki, named after the Norse trickster god, is due to explode sometime in mid-September. The volcano last erupted in May 2018, an event also predicted by scientists.  “Loki volcano is huge — 200 kilometers across ...read more

When Did Humans Reach North America? The Question Keeps Growing More Complex

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Native Americans have been visiting Calvert Island off the Canadian coast for more than 10,000 years. (Credit: Pacific Northwest Sailing/Shutterstock) Humans have long found comfort on Calvert Island, just off the coast of mainland British Columbia. For millennia, they have climbed the island’s rocky outcrops, walked through its rainy conifer forests, and waded through its chilly intertidal pools to collect crabs, mussels, and other marine life. There, in 2014, a group of Canadian re ...read more

This is What Denisovans May Have Looked Like

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This is an estimate of what Denisovan's may have looked like, based on a new DNAS analysis technique. (Credit: Maayan Harel) Every time archaeologists pry the remains of a newly-identified human ancestor from the earth, there’s one question we care about most: What did they look like? For the first time, researchers have tried to answer that burning query about Denisovans, one of the most intriguing ancient relatives on our family tree. Discovered in 2010 in a Siberian cave, these an ...read more

This Gut Bacteria Makes People Drunk Without Drinking — And Causes Liver Disease

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Klebsiella pneumoniae bacteria grown in culture. (Credit: Sirirat/Shutterstock) Three years ago, a woman in upstate New York was charged with drunk driving and then exonerated when she proved her high blood alcohol level was the result of a rare condition in which her body brews its own alcohol. At the time, the bizarre story made national headlines. Now, auto-brewery syndrome, as the condition is called, may have helped researchers unlock some of the secrets of a common but little-understo ...read more

Evaporating Exomoon Could Explain Weird Light Patterns of Tabby’s Star

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An artist’s concept of a ring of dust orbiting Tabby’s Star. (Credit: NASA/JPL-Caltech) About four years ago, one star gained notoriety when some astronomers suggested its weird light pattern could be signs of artificial “alien megastructures” blocking the star’s light. Though scientists generally say that clouds of gas and dust are most likely the culprit, the source of that gas and dust remains a mystery. One possibility is that the star, formally called KI ...read more

One Protein Makes Ebola Deadly. Scientists Can Turn it Off

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A sign in the Democratic Republic of the Congo warns people that Ebola is in the area. (Credit: Sergey Uryadnikov/Shutterstock) The Ebola virus continues to ravage populations across Africa. But earlier this week, researchers reported that they've figured out what makes Ebola just so virulent. One particular protein is giving Ebola its punch, and researchers know how to switch it off. The find could lead to new vaccines and may give a huge boost to Ebola research safety. Ebola's Sneak At ...read more

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