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    Ancient Calendar, Recently Discovered, May Document a Long-Ago Disaster

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    The markings on a pillar in southern Turkey are more than decorations on the stone, a researcher at the University of Edinburgh says. They may memorialize a time when comet fragments struck Earth.A researcher at the University of Edinburgh has discovered what he believes is the earliest calendar of its kind at Gobekli Tepe, an archaeological excavation site in what is now southern Turkey that used to be an ancient complex of temple-like enclosures.The researcher, Martin Sweatman, a scientist at the University of Edinburgh, said in research published last month that V-shaped markings on the lunisolar calendar, which combines the movements of the moon and sun, recorded a major astronomical event that had a huge impact on Earth — making the ancient pillar part of an ancient version of a memorial.Dr. Sweatman said that the intricate carvings at Gobekli Tepe tell the story and document the date when fragments of a comet — which came from a meteor stream — hit Earth roughly 13,000 years ago. The comet strike, which the latest research has placed in the year 10,850 B.C., has long been a source of disagreement among academics and researchers.This is not the first time that Dr. Sweatman has been able to connect the impact of the comet to the site in Turkey, he said. In 2017, he linked the two in an academic paper in which he contended that the carvings at Gobekli Tepe were memorialized in the pillars, and that the site was used as a place to observe space.At the time, a group of excavators at Gobekli Tepe challenged those findings. Jens Notroff, an archaeologist who wrote the post on the excavators’ website, was not immediately convinced about the new findings and questioned whether the markings had a deeper meaning. He said on the social media platform X that there was an “an obsession with the idea that there *must* be a secret, a hidden code which needs to and can be decoded — while it’s really just about past humans living their lives.”Dr. Sweatman said the recent discovery that one of the pillars also depicts a lunisolar calendar — and thus marks the day of the impact — lined up with his prior research. “We can be very confident indeed that it’s a date,” he said.We are having trouble retrieving the article content.Please enable JavaScript in your browser settings.Thank you for your patience while we verify access. If you are in Reader mode please exit and log into your Times account, or subscribe for all of The Times.Thank you for your patience while we verify access.Already a subscriber? Log in.Want all of The Times? Subscribe. More

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      Planet Sets Record for Hottest Day Twice in a Row

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      Researchers with the European Union’s Copernicus Climate Change Service said Sunday was Earth’s hottest day. Then it happened again on Monday.Monday was most likely the hottest day ever recorded on Earth, with a global average of about 62.87 degrees Fahrenheit, or 17.15 degrees Celsius, preliminary data showed — beating a record that had been set just one day before.The data, released on Wednesday by the Copernicus Climate Change Service, a European Union institution that provides information about the past, present and future climate, caused alarm among some experts.Earlier this week, the service announced that Sunday had set a record, with a global average of about 62.76 degrees Fahrenheit, or 17.09 degrees Celsius. A day later it announced that Monday was the hottest day since at least 1940, when records began.Before this week’s back-to-back records, the previous record, 62.74 degrees Fahrenheit, or 17.08 degrees Celsius, was set last year, on July 6, besting a record that stood since 2016.Since Sunday’s and Monday’s temperatures were averages, some portions of the globe felt that extra heat more strongly, like parts of the Western United States where an excessive heat warning has been in place for days and is expected to continue for much of the week.“What is truly staggering is how large the difference is between the temperature of the last 13 months and the previous temperature records,” Carlo Buontempo, the director of the service, said in a news release announcing Sunday’s record. “We are now in truly uncharted territory and as the climate keeps warming, we are bound to see new records being broken in future months and years.”We are having trouble retrieving the article content.Please enable JavaScript in your browser settings.Thank you for your patience while we verify access. If you are in Reader mode please exit and log into your Times account, or subscribe for all of The Times.Thank you for your patience while we verify access.Already a subscriber? Log in.Want all of The Times? Subscribe. More

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      Voyager 1, After Major Malfunction, Is Back From the Brink, NASA Says

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      The farthest man-made object in space had been feared lost forever after a computer problem in November effectively rendered the 46-year-old probe useless.Several months after a grave computer problem seemed to spell the end for Voyager 1, which for nearly a half century had provided data on the outer planets and the far reaches of the solar system, NASA announced on Thursday that it had restored the spacecraft to working order.“The spacecraft has resumed gathering information about interstellar space,” NASA said in its announcement about Voyager 1, the farthest man-made object in space.Since the problem surfaced in November, engineers had been working to diagnose and resolve the issue, a tedious and lengthy process complicated by the fact that it takes almost two days to send and receive information from Voyager 1, which was the first man-made object ever to enter interstellar space and is currently more than 15 billion miles from Earth.The space community had been holding its breath since last year as the prospect of fixing the aging probe appeared as dire as ever.In February, Suzanne Dodd, the Voyager mission project manager, said the problem, which hindered Voyager 1’s ability to send coherent engineering and science data back to Earth, was “the most serious issue” the probe had faced since she began leading the mission in 2010.Voyager 1 and its twin probe, Voyager 2, were launched in 1977 on a mission to explore the outer planets. NASA capitalized on a rare alignment in the solar system that enabled the probes to visit the four of the outer planets — Jupiter, Saturn, Uranus and Neptune — by using the gravity of each to swing to the next.We are having trouble retrieving the article content.Please enable JavaScript in your browser settings.Thank you for your patience while we verify access. If you are in Reader mode please exit and log into your Times account, or subscribe for all of The Times.Thank you for your patience while we verify access.Already a subscriber? Log in.Want all of The Times? Subscribe. More

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      Northern Lights Set to Return Tonight as Extreme Solar Storm Continues

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      Electrical utilities said they weathered earlier conditions as persistent geomagnetic storms were expected to cause another light show in evening skies.Night skies in many parts of the Northern Hemisphere are expected to bloom again on Saturday night with the vivid colors of the northern lights, or aurora borealis, as a powerful geomagnetic storm caused by a hyperactive sun persists through the weekend.The National Oceanic and Atmospheric Administration, which monitors space weather, said in an update on Saturday that it continued to observe solar activity that could lead to periods of “severe-extreme” geomagnetic storms. The federal agency first issued a warning on Friday as bursts of material from the sun’s surface traveled into Earth’s atmosphere, causing irregularities in power, navigation and communication systems.Major power utilities had largely prepared their electrical grids for the solar storm, and their customers were unaffected.For most people, the solar storm was a gift: It caused ribbons of pink, purple and green light across night skies of much of the United States, Canada and Europe. Where evening skies are clear on Saturday, the lights can be expected again.Known as aurora, the light is caused by particles from the sun interacting with gases in Earth’s atmosphere, and is usually only observed at latitudes closer to the North or South Pole. But on Friday night, residents of lower latitudes, including those in North Carolina and Arizona, saw the dancing lights.Jane Wong, 30, of San Francisco, drove to the Presidio overlooking the Golden Gate Bridge where conditions started out foggy. But at midnight, her wait paid off as the sky started to clear.We are having trouble retrieving the article content.Please enable JavaScript in your browser settings.Thank you for your patience while we verify access. If you are in Reader mode please exit and log into your Times account, or subscribe for all of The Times.Thank you for your patience while we verify access.Already a subscriber? Log in.Want all of The Times? Subscribe. More

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      Geologists Make It Official: We’re Not in an ‘Anthropocene’ Epoch

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      The field’s governing body ratified a vote by scientists on the contentious issue, ending a long effort to update the timeline of Earth’s history.The highest governing body in geology has upheld a contested vote by scientists against adding the Anthropocene, or human age, to the official timeline of Earth’s history.The vote, which a committee of around two dozen scholars held in February, brought an end to nearly 15 years of debate about whether to declare that our species had transformed the natural world so thoroughly since the 1950s as to have sent the planet into a new epoch of geologic time.Shortly after voting ended this month, however, the committee’s chair, Jan A. Zalasiewicz, and vice chair, Martin J. Head, called for the results to be annulled. They said the members had voted prematurely, before evaluating all the evidence.Dr. Zalasiewicz and Dr. Head also asserted that many members shouldn’t have been allowed to vote in the first place because they had exceeded their term limits.After considering the matter, the committee’s parent body, the International Union of Geological Sciences, has decided the results will stand, the union’s executive committee said in a statement on Wednesday.We are having trouble retrieving the article content.Please enable JavaScript in your browser settings.Thank you for your patience while we verify access. If you are in Reader mode please exit and log into your Times account, or subscribe for all of The Times.Thank you for your patience while we verify access.Already a subscriber? Log in.Want all of The Times? Subscribe. More

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      Jeff Bezos’ Blue Origin Rocket Moves Closer to Launch

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      Blue Origin’s New Glenn rocket rolled to the launchpad for a series of tests in preparation for its maiden flight later this year.There’s an easy knock against the space dreams of Jeff Bezos and his rocket company, Blue Origin: In its 24th year of existence, the company has yet to launch a single thing to orbit.Blue Origin’s accomplishments to date are modest — a small vehicle known as New Shepard that takes space tourists and experiments on brief suborbital jaunts. By contrast, SpaceX, the rocket company started by the other high-profile space billionaire, Elon Musk, today dominates the launch market.On Wednesday, Blue Origin hopes to change the narrative, holding a coming-out party of sorts for its new big rocket.In the morning, at Launch Complex 36 at the Cape Canaveral Space Force Station in Florida, the doors to a giant garage opened. The rocket, as tall as a 32-story building, lay horizontally on the trusses of a mobile launch platform.The contraption was sitting on a transport mechanism that resembles several long mechanical centipedes, but with wheels, 288 in all, instead of feet. It began rolling slowly out and up a concrete incline, a quarter-mile trip toward the launchpad.The rocket will undergo at least a week of tests before returning to the garage.“I’m very confident there’s going to be a launch this year,” Dave Limp, the chief executive of Blue Origin, said in an interview. “We’re going to show a lot of progress this year. I think people are going to see how fast we can move.”We are having trouble retrieving the article content.Please enable JavaScript in your browser settings.Thank you for your patience while we verify access. If you are in Reader mode please exit and log into your Times account, or subscribe for all of The Times.Thank you for your patience while we verify access.Already a subscriber? Log in.Want all of The Times? Subscribe. More

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      U.S. Warns Allies Russia Could Put a Nuclear Weapon Into Orbit This Year

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      The American assessments are divided, however, and President Vladimir Putin denied having such an intention, saying that Russia was “categorically against” it.American intelligence agencies have told their closest European allies that if Russia is going to launch a nuclear weapon into orbit, it will probably do so this year — but that it might instead launch a harmless “dummy” warhead into orbit to leave the West guessing about its capabilities.The assessment came as American intelligence officials conducted a series of rushed, classified briefings for their NATO and Asian allies, as details of the American assessment of Russia’s intentions began to leak out.The American intelligence agencies are sharply divided in their opinion about what President Vladimir V. Putin is planning, and on Tuesday Mr. Putin rejected the accusation that he intended to place a nuclear weapon in orbit and his defense minister said the intelligence warning was manufactured in an effort to get Congress to authorize more aid for Ukraine.During a meeting with the defense minister, Sergei K. Shoigu, Mr. Putin said Russia had always been “categorically against” placing nuclear weapons in space, and had respected the 1967 Outer Space Treaty, which prohibits weaponizing space, including the placement of nuclear weapons in orbit.“We not only call for the observance of the existing agreements that we have in this area,” he was quoted as saying by the Russian state media, “but we have proposed many times to strengthen these joint efforts.”On Wednesday, Mr. Putin reinforced the central role he believes Russia’s nuclear arsenal plays in the country’s defenses: Visiting an aviation factory, he climbed into the bomb bay of a Tu-160M strategic bomber, the most modern in the Russian fleet.We are having trouble retrieving the article content.Please enable JavaScript in your browser settings.Thank you for your patience while we verify access. If you are in Reader mode please exit and log into your Times account, or subscribe for all of The Times.Thank you for your patience while we verify access.Already a subscriber? Log in.Want all of The Times? Subscribe. More

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      The Doomsday Clock Keeps Ticking

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      Year
      Minutes to Midnight

      2023
      1.5

      2020
      1.67

      2018
      2

      2017
      2.5

      2015
      3

      2012
      5

      2010
      6

      2007
      5

      2002
      7

      1998
      9

      1995
      14

      1991
      17

      1990
      10

      1988
      6

      1984
      3

      1981
      4

      1980
      7

      1974
      9

      1972
      12

      1969
      10

      1968
      7

      1963
      12

      1960
      7

      1953
      2

      1949
      3

      1947
      7

      The Bomb and I go way back. In Seattle, where I grew up in the 1950s and ’60s, it was common wisdom that in the event of nuclear war, we were No. 2 on the target list because Seattle was the home of Boeing, maker of B-52 bombers and Minuteman missiles.In school we had various drills for various catastrophes, and we had to remember which was which. Earthquake? Run outside. The Bomb? Run inside, to an inner corridor that had no windows. In the summer, my high-school friends and I would disappear for a couple of weeks into the backcountry of the Cascades or the Olympic Mountains. I always wondered whether we would emerge to find the world in ashes.Once, in Santa Monica in 1971, I thought it was finally happening. I woke up on the floor, having been bounced out of my bed early one February morning. There was a huge roar. Everything was shaking. I crept to my one window and pulled aside the curtain, expecting to see a mushroom cloud rising over the Los Angeles basin. I saw nothing. When the radio came back, I learned there had been a deadly earthquake in the San Fernando Valley.I was sent on this trip down memory lane by the announcement on Jan. 23 from the Bulletin of the Atomic Scientists that it had decided not to change the setting of the Doomsday Clock, a metaphorical timepiece invented in 1947 as a way to dramatize the threat of nuclear Armageddon. The clock was originally designed with a 15-minute range, counting down to midnight — the stroke of doom — and the Bulletin’s members move it from time to time in response to current events, which now include threats like climate change and pandemics.In a burst of optimism in 1991, after the Soviet Union broke up and the first Strategic Arms Reduction Treaty was signed, the clock was turned way back to 17 minutes to midnight. “The Cold War is over,” the Bulletin’s editors wrote. “The 40-year-long East-West nuclear arms race has ended.”A year ago, after Russia invaded Ukraine and brandished the threat of using nuclear weapons, the clock was set to 90 seconds to midnight, the closest it has yet come to The End. The threat of nuclear weapons in Ukraine has diminished since then, but the clock remains poised at 90 seconds before zero.We are having trouble retrieving the article content.Please enable JavaScript in your browser settings.Thank you for your patience while we verify access. If you are in Reader mode please exit and log into your Times account, or subscribe for all of The Times.Thank you for your patience while we verify access.Already a subscriber? Log in.Want all of The Times? Subscribe. More