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Rabyflill

01 Apr 2025 - 06:09 pm

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01 Apr 2025 - 05:57 pm

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01 Apr 2025 - 05:39 pm

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Claraacive

01 Apr 2025 - 05:38 pm

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Donaldmak

01 Apr 2025 - 05:12 pm

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01 Apr 2025 - 04:35 pm

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Billypycle

01 Apr 2025 - 04:08 pm

Mist and microlightning
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To recreate a scenario that may have produced Earth’s first organic molecules, researchers built upon experiments from 1953 when American chemists Stanley Miller and Harold Urey concocted a gas mixture mimicking the atmosphere of ancient Earth. Miller and Urey combined ammonia (NH3), methane (CH4), hydrogen (H2) and water, enclosed their “atmosphere” inside a glass sphere and jolted it with electricity, producing simple amino acids containing carbon and nitrogen. The Miller-Urey experiment, as it is now known, supported the scientific theory of abiogenesis: that life could emerge from nonliving molecules.
For the new study, scientists revisited the 1953 experiments but directed their attention toward electrical activity on a smaller scale, said senior study author Dr. Richard Zare, the Marguerite Blake Wilbur Professor of Natural Science and professor of chemistry at Stanford University in California. Zare and his colleagues looked at electricity exchange between charged water droplets measuring between 1 micron and 20 microns in diameter. (The width of a human hair is 100 microns.)

“The big droplets are positively charged. The little droplets are negatively charged,” Zare told CNN. “When droplets that have opposite charges are close together, electrons can jump from the negatively charged droplet to the positively charged droplet.”
The researchers mixed ammonia, carbon dioxide, methane and nitrogen in a glass bulb, then sprayed the gases with water mist, using a high-speed camera to capture faint flashes of microlightning in the vapor. When they examined the bulb’s contents, they found organic molecules with carbon-nitrogen bonds. These included the amino acid glycine and uracil, a nucleotide base in RNA.

“We discovered no new chemistry; we have actually reproduced all the chemistry that Miller and Urey did in 1953,” Zare said. Nor did the team discover new physics, he added — the experiments were based on known principles of electrostatics.

“What we have done, for the first time, is we have seen that little droplets, when they’re formed from water, actually emit light and get this spark,” Zare said. “That’s new. And that spark causes all types of chemical transformations.”

Herbertclene

01 Apr 2025 - 04:05 pm

A tiny rainforest country is growing into a petrostate. A US oil company could reap the biggest rewards
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Guyana’s destiny changed in 2015. US fossil fuel giant Exxon discovered nearly 11 billion barrels of oil in the deep water off the coast of this tiny, rainforested country.

It was one of the most spectacular oil discoveries of recent decades. By 2019, Exxon and its partners, US oil company Hess and China-headquartered CNOOC, had started producing the fossil fuel.? They now pump around 650,000 barrels of oil a day, with plans to more than double this to 1.3 million by 2027.

Guyana now has the world’s highest expected oil production growth through 2035.

This country — sandwiched between Brazil, Venezuela and Suriname — has been hailed as a climate champion for the lush, well-preserved forests that carpet nearly 90% of its land. It is on the path to becoming a petrostate at the same time as the impacts of the fossil fuel-driven climate crisis escalate.

While the government says environmental protection and an oil industry can go hand-in-hand, and low-income countries must be allowed to exploit their own resources, critics say it’s a dangerous path in a warming world, and the benefits may ultimately skew toward Exxon — not Guyana.

Williamnup

01 Apr 2025 - 03:58 pm

Xavier completes thrilling comeback, Mount St. Mary’s advances as men’s First Four comes to a close
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Wednesday saw the men’s First Four come to a close which means only one thing: the 64-team bracket is officially set following No. 11 Xavier’s thrilling come from behind win over No. 11 Texas and No. 16 Mount St. Mary’s victory over No. 16 American in Dayton, Ohio.

The Musketeers trailed by as many as 13 points, but their offense came alive in the second half behind guard Marcus Foster and forward Zach Freemantle to down the Longhorns 86-80.

The senior Foster scored a team-high 22 points while Freemantle, on his way to 15 points, threw down a dunk with a second left to seal the comeback win and ignite the fans at UD Arena, which is just over 50 miles away from campus in Cincinnati, Ohio.

With just under four minutes remaining, Xavier went on an 8-2 run to take a 78-74 lead, their first since the early going of the first half.

Musketeers head coach Sean Miller crowned Wednesday’s game as “one of the best” he’s been a part of.

“I thought we were dead in the water two different times,” Miller told the truTV broadcast after the game. “But that’s the one thing about our team — the resiliency of our group has always won out for us. Just when you thought we weren’t gonna make the tournament, we kept winning. Even in this game, just when you’re like, ‘It’s not gonna work out,’ we have a funny way of staying with it.”

The Longhorns did not go down without a fight as guard Tre Johnson scored a game-high 23 points in the loss.

Xavier will face No. 6 Illinois in the first round on Friday at the Fiserv Forum in Milwaukee.

Williamfeene

01 Apr 2025 - 03:54 pm

A librarian ran off with a yacht captain in the summer of 1968. It was the start of an incredible love story
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The first time Beverly Carriveau saw Bob Parsons, she felt like a “thunderbolt” passed between them.

“This man stepped out of a taxi, and we both just stared at each other,” Beverly tells CNN Travel today. “You have to remember, this is the ‘60s. Girls didn’t stare at men. But it was a thunderbolt.”

It was June 1968. Beverly was a 23-year-old Canadian university librarian on vacation in Mazatlan, Mexico, with a good friend in tow.

Beverly had arrived in Mazatlan that morning. She’d been blown away by the Pacific Ocean views, the colorful 19th-century buildings, the palm trees.

Now, Beverly was browsing the hotel gift store, admiring a pair of earrings, when she looked up and spotted the man getting out of the taxi. The gift shop was facing the parking lot, and there he was.

“I was riveted,” says Beverly. “He was tall, handsome…”

Eventually, Beverly tore away her gaze, bought the earrings and dashed out of the store.

“We locked eyes so long, I was embarrassed,” she says.

No words had passed between them. They hadn’t even smiled at each other. But Beverly felt like she’d revealed something of herself. She felt like something had happened, but she couldn’t describe it.
Beverly rushed to meet her friend, still feeling flustered. Over dinner in the hotel restaurant, Beverly confided in her friend about the “thunderbolt” moment.

“I told my girlfriend, ‘Something just happened to me. I stared at this man, and I couldn’t help myself.’”

Then, the server approached Beverly’s table.

“He said, ‘I have some wine for you, from a man over there.’”

The waiter was holding a bottle of white wine, indicating at the bar, which was packed with people.

As a rule, Beverly avoided accepting drinks from men in bars. She never felt especially comfortable with the power dynamic — plus, she had a long-term partner back in Canada.

“I had a serious boyfriend at home and thought my life was on course,” she says.