Sulfur was key to the first water on Earth
A chemical element that’s not even in H2O — sulfur — is the reason Earth first got its water, a new study finds, bolstering a similar claim made a year …
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Some ‘forever chemicals’ may be absorbed through our skin
Forever chemicals are everywhere. They’re in school uniforms, food packaging, cosmetics and personal care products (SNE: 11/18/22; SN: 6/4/19; SN: 6/15/21). They seep into our food and drinking water. And …
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The CDC has tightened rabies regulations for imported dogs. Here’s why
The U.S. Centers for Disease Control and Prevention tightened rabies regulations for dogs coming into the country. The new regulations, which went into effect August 1, come as the temporary …
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Jupiter’s Great Red Spot may be less than 200 years old
Jupiter’s signature feature — its Great Red Spot — might not be the same dark spot seen on the giant planet more than three centuries ago. From 1665 to 1713, …
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A black hole made from pure light is impossible, thanks to quantum physics
Black holes can’t be formed from pure light. Quantum physics would curb their creation under any foreseeable conditions, a new study suggests. Typically, matter is responsible for black holes. They’re …
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An Egyptian mummy’s silent ‘scream’ might have been fixed at death
An ancient Egyptian mummy, dubbed the “Screaming Woman” for what appears to be an open-mouthed look of pain or fear, might have had that expression fixed in place by a …
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A planet needs to start with a lot of water to become like Earth
In planet formation, as in poker, you have to play the hand you’re dealt. If an Earthlike planet is the goal, the best starting hand might contain three to eight …
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Something weird is happening to Earth’s inner core
Something strange is happening at Earth’s center. Decades of earthquake data show that Earth’s inner core has been rotating slower than its mantle and surface since around 2010, researchers report …
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Alzheimer’s blood tests are getting better, but still have a ways to go
Alzheimer’s disease is hard to diagnose. But proteins in the blood might provide clarity. A series of recent findings, presented at the annual Alzheimer’s Association International Conference in Philadelphia and …
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The North Star is much heavier than previously thought
The star marking true north is a good deal heavier than we thought. The North Star is 5.1 times as massive as the sun, astronomers report in work submitted July …
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