SpaceX launches 75th Falcon 9 rocket this year
Another set of Starlink satellites are now in orbit.
The Falcon 9 rocket lifted off from Cape Canaveral early Wednesday, carrying 28 satellites into low Earth orbit.
This was the 75th Falcon 9 launch of the year.
The booster rocket landed on a droneship in the Atlantic Ocean eight minutes after liftoff.
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New York Times
an hour ago
- New York Times
Can You Choose an A.I. Model That Harms the Planet Less?
From uninvited results at the top of your search engine queries to offering to write your emails and helping students do homework, generative A.I. is quickly becoming part of daily life as tech giants race to develop the most advanced models and attract users. All those prompts come with an environmental cost: A report last year from the Energy Department found A.I. could help increase the portion of the nation's electricity supply consumed by data centers from 4.4 percent to 12 percent by 2028. To meet this demand, some power plants are expected to burn more coal and natural gas. And some chatbots are linked to more greenhouse gas emissions than others. A study published Thursday in the journal Frontiers in Communication analyzed different generative A.I. chatbots' capabilities and the planet-warming emissions generated from running them. Researchers found that chatbots with bigger 'brains' used exponentially more energy and also answered questions more accurately — up until a point. 'We don't always need the biggest, most heavily trained model, to answer simple questions. Smaller models are also capable of doing specific things well,' said Maximilian Dauner, a Ph.D. student at the Munich University of Applied Sciences and lead author of the paper. 'The goal should be to pick the right model for the right task.' The study evaluated 14 large language models, a common form of generative A.I. often referred to by the acronym LLMs, by asking each a set of 500 multiple choice and 500 free response questions across five different subjects. Mr. Dauner then measured the energy used to run each model and converted the results into carbon dioxide equivalents based on global most of the models tested, questions in logic-based subjects, like abstract algebra, produced the longest answers — which likely means they used more energy to generate compared with fact-based subjects, like history, Mr. Dauner said. A.I. chatbots that show their step-by-step reasoning while responding tend to use far more energy per question than chatbots that don't. The five reasoning models tested in the study did not answer questions much more accurately than the nine other studied models. The model that emitted the most, DeepSeek-R1, offered answers of comparable accuracy to those that generated a fourth of the amount of emissions. Source: Dauner and Socher, 2025 Note: A.I. models answered 500 free-response questions By Harry Stevens/The New York Times Grams of CO2 emitted per answer Source: Dauner and Socher, 2025 Note: A.I. models answered 100 free-response questions in each category By Harry Stevens/The New York Times Want all of The Times? Subscribe.
Washington Post
an hour ago
- Washington Post
Scientists warn that greenhouse gas accumulation is accelerating and more extreme weather will come
WASHINGTON — Humans are on track to release so much greenhouse gas in less than three years that a key threshold for limiting global warming will be nearly unavoidable, according to a study to be released Thursday. The report predicts that society will have emitted enough carbon dioxide by early 2028 that crossing an important long-term temperature boundary will be more likely than not. The scientists calculate that by that point there will be enough of the heat-trapping gas in the atmosphere to create a 50-50 chance or greater that the world will be locked in to 1.5 degrees Celsius (2.7 degrees Fahrenheit) of long-term warming since preindustrial times. That level of gas accumulation, which comes from the burning of fuels like gasoline, oil and coal, is sooner than the same group of 60 international scientists calculated in a study last year. 'Things aren't just getting worse. They're getting worse faster,' said study co-author Zeke Hausfather of the tech firm Stripe and the climate monitoring group Berkeley Earth. 'We're actively moving in the wrong direction in a critical period of time that we would need to meet our most ambitious climate goals. Some reports, there's a silver lining. I don't think there really is one in this one.' That 1.5 goal , first set in the 2015 Paris agreement, has been a cornerstone of international efforts to curb worsening climate change. Scientists say crossing that limit would mean worse heat waves and droughts, bigger storms and sea-level rise that could imperil small island nations. Over the last 150 years, scientists have established a direct correlation between the release of certain levels of carbon dioxide, along with other greenhouse gases like methane, and specific increases in global temperatures. In Thursday's Indicators of Global Climate Change report, researchers calculated that society can spew only 143 billion more tons (130 billion metric tons) of carbon dioxide before the 1.5 limit becomes technically inevitable. The world is producing 46 billion tons (42 billion metric tons) a year, so that inevitability should hit around February 2028 because the report is measured from the start of this year, the scientists wrote. The world now stands at about 1.24 degrees Celsius (2.23 degrees Fahrenheit) of long-term warming since preindustrial times, the report said. The report, which was published in the journal Earth System Science Data , shows that the rate of human-caused warming per decade has increased to nearly half a degree (0.27 degrees Celsius) per decade, Hausfather said. And the imbalance between the heat Earth absorbs from the sun and the amount it radiates out to space, a key climate change signal, is accelerating, the report said. 'It's quite a depressing picture unfortunately, where if you look across the indicators, we find that records are really being broken everywhere,' said lead author Piers Forster, director of the Priestley Centre for Climate Futures at the University of Leeds in England. 'I can't conceive of a situation where we can really avoid passing 1.5 degrees of very long-term temperature change.' The increase in emissions from fossil-fuel burning is the main driver. But reduced particle pollution, which includes soot and smog, is another factor because those particles had a cooling effect that masked even more warming from appearing, scientists said. Changes in clouds also factor in. That all shows up in Earth's energy imbalance, which is now 25% higher than it was just a decade or so ago, Forster said. Earth's energy imbalance 'is the most important measure of the amount of heat being trapped in the system,' Hausfather said. Earth keeps absorbing more and more heat than it releases. 'It is very clearly accelerating. It's worrisome,' he said. The planet temporarily passed the key 1.5 limit last year . The world hit 1.52 degrees Celsius (2.74 degrees Fahrenheit) of warming since preindustrial times for an entire year in 2024, but the Paris threshold is meant to be measured over a longer period, usually considered 20 years. Still, the globe could reach that long-term threshold in the next few years even if individual years haven't consistently hit that mark, because of how the Earth's carbon cycle works. That 1.5 is 'a clear limit, a political limit for which countries have decided that beyond which the impact of climate change would be unacceptable to their societies,' said study co-author Joeri Rogelj, a climate scientist at Imperial College London. The mark is so important because once it is crossed, many small island nations could eventually disappear because of sea level rise, and scientific evidence shows that the impacts become particularly extreme beyond that level, especially hurting poor and vulnerable populations, he said. He added that efforts to curb emissions and the impacts of climate change must continue even if the 1.5 degree threshold is exceeded. Crossing the threshold 'means increasingly more frequent and severe climate extremes of the type we are now seeing all too often in the U.S. and around the world — unprecedented heat waves, extreme hot drought, extreme rainfall events, and bigger storms,' said University of Michigan environment school dean Jonathan Overpeck, who wasn't part of the study. Andrew Dessler, a Texas A&M University climate scientist who wasn't part of the study, said the 1.5 goal was aspirational and not realistic, so people shouldn't focus on that particular threshold. 'Missing it does not mean the end of the world,' Dessler said in an email, though he agreed that 'each tenth of a degree of warming will bring increasingly worse impacts.' ___ The Associated Press' climate and environmental coverage receives financial support from multiple private foundations. AP is solely responsible for all content. Find AP's standards for working with philanthropies, a list of supporters and funded coverage areas at .
CBS News
an hour ago
- CBS News
Welcome to Cosmos, a Minnesota town that's out of this world
See why this Minnesota town is out of this world See why this Minnesota town is out of this world See why this Minnesota town is out of this world In Cosmos, Minnesota, residents are a little closer to the stars. "We had a real moon rock here one year after the moon landings and it came from NASA," said Cosmos City Councilman Mark Minnick. Minnick, a life-long resident and a town historian, says Norwegian immigrant Ole Nelson built the first log house in the 1860s, but pioneer Daniel Hoyt came up with the name "Cosmos" as a way to bring people in. Hoyt had plans to build a major university in town. "Big. Everybody would want to come. Full credentials. Oh, it was going to be big time. Big time," Minnick said. "The name stuck, but the university didn't materialize." But that didn't really matter, because the name is what put the town on the map. Instead of the typical Elm Street or Oak Street, Cosmos named all its streets after galaxies, planets and constellations, from Milky Way to Mars Street. WCCO And when you travel through town, busy Highway 7 briefly turns into Astro Boulevard. Even the water tower is space-themed, but it's nothing like the old water tower, which had a rocket sitting right on top of it, about 140 feet closer to space. It could blast off, but it just wouldn't get very far. "Those are oil barrels and then the local blacksmith shop welding everything up, made the nose cone and the fins and then it got mounted on top of the water tower," he said. The rocket is now in the town's Space Festival parade every July. Neptune Ned and a random bird simply known as "Local Chicken" also make an appearance. The town's local newspaper, the Galactic Gazette, has more than 100 subscribers and contains space news and dad jokes. The staff is comprised of Minnick, his wife Deb and friend Curt Meyer. This Cosmos is a smaller universe, and that's OK with its space-loving residents. Though some are still waiting for an alien other than Neptune Ned to pay a visit. "They exist, they just aren't showing themselves," Minnick said. The Cosmos Space Festival began after the moon landing in 1969. It's the third week in July, and it's not all about space. In the past, they've also had carnival rides, pig races and "cow pie bingo."
