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"Alaska's top-heavy glaciers are approaching an irreversible tipping point."

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Russ Roberts (https://hawaiisciencejournal.blogspot.com).

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Alaska’s top-heavy glaciers are approaching an irreversible tipping point

Alaska's Juneau icefield melting rapidly

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37by The Conversation / 2h

Enlarge / Taku Glacier is one of many that begin in the Juneau Icefield. (credit: Mauricio Handler / Getty Images ) The melting of one of North America’s largest ice fields has accelerated and could soon reach an irreversible tipping point. That’s the conclusion of new research colleagues and I have published on the Juneau Icefield, which straddles the Alaska-Canada border near the Alaskan capita

The Yellowstone supervolcano destroyed an ecosystem but saved it for us

by Jeanne Timmons / 2h

Enlarge / Interior view of the Rhino Barn. Exposed fossil skeletons left in-situ for research and public viewing. (credit: Rick E. Otto, University of Nebraska State Museum) Death was everywhere. Animal corpses littered the landscape and were mired in the local waterhole as ash swept around everything in its path. For some, death happened quickly; for others, it was slow and painful. This was the

Egalitarian oddity found in the Neolithic

81by Elizabeth Rayne / 1d

Enlarge / A skeleton found during 1950's excavations at the Barman site. (credit: Université de Genève ) Did ancient people practice equality? While stereotypes may suggest otherwise, the remains of one Neolithic society reveal evidence that both men and women, as well as locals and foreigners, were all equal in at least a critical aspect of life: what they ate. The Neolithic saw the dawn of agri

YESTERDAY

The greening of planes, trains, and automobiles

by Knowable Magazine / 1d

Enlarge (credit: Petmal / Getty Images ) As the world races to decarbonize everything from the electricity grid to industry, it faces particular problems with transportation—which alone is responsible for about a quarter of our planet’s energy-related greenhouse gas emissions . The fuels for transport need to be not just green, cheap, and powerful, but also lightweight and safe enough to be carri

JUL 5, 2024

Rocket Report: Firefly delivers for NASA; Polaris Dawn launching this month

by Stephen Clark / 1d

Enlarge / Four kerosene-fueled Reaver engines power Firefly's Alpha rocket off the pad at Vandenberg Space Force Base, California. (credit: Firefly Aerospace ) Welcome to Edition 7.01 of the Rocket Report! We're compiling this week's report a day later than usual due to the Independence Day holiday. Ars is beginning its seventh year publishing this weekly roundup of rocket news, and there's a lot

What we know about microdosing candy illnesses as death investigation underway

FDA investigates illnesses from psychedelic candy

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by Beth Mole / 1d

Enlarge / The Birthday Cake flavored bar. One person may have died from eating Diamond Shruumz microdosing candies, which were recalled last week amid a rash of severe illnesses involving seizures, intubation, and intensive care stays . According to an update this week from the Food and Drug Administration , the cluster of cases continues to increase across the country. To date, 48 people across

ITER fusion reactor to see further delays, with operations pushed to 2034

ITER completes complex magnet system

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by John Timmer / 1d

Enlarge / One of the components of the reactor during leak testing. (credit: ITER ) On Tuesday, the people managing the ITER experimental fusion reactor announced that a combination of delays and altered priorities meant that its first-of-its-kind hardware wouldn't see plasma until 2036, with the full-energy deuterium-tritium fusion pushed back to 2039. The latter represents a four-year delay rel

ChatGPT’s much-heralded Mac app was storing conversations as plain text

by Samuel Axon / 1d

Enlarge / The app lets you invoke ChatGPT from anywhere in the system with a keyboard shortcut, Spotlight-style. (credit: Samuel Axon) OpenAI announced its Mac desktop app for ChatGPT with a lot of fanfare a few weeks ago, but it turns out it had a rather serious security issue: user chats were stored in plain text, where any bad actor could find them if they gained access to your machine. As Thr

Elon Musk denies tweets misled Twitter investors ahead of purchase

Musk seeks dismissal of lawsuit

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by Ashley Belanger / 1d

Enlarge (credit: Marc Piasecki / Contributor | Getty Images Entertainment ) Just before the Fourth of July holiday, Elon Musk moved to dismiss a lawsuit alleging that he intentionally misled Twitter investors in 2022 by failing to disclose his growing stake in Twitter while tweeting about potentially starting his own social network in the weeks ahead of announcing his plan to buy Twitter. Alleged

Here’s why SpaceX’s competitors are crying foul over Starship launch plans

SpaceX and Blue Origin feud

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20by Stephen Clark / 1d

Enlarge / SpaceX launches Falcon 9 rockets from Pad 39A at NASA's Kennedy Space Center and from Pad 40 at Cape Canaveral Space Force Station. The company plans to develop Starship launch infrastructure at Pad 39A and Pad 37. United Launch Alliance flies Vulcan and Atlas V rockets from Pad 41, and Blue Origin will base its New Glenn rocket at Pad 36. (credit: NASA (labels by Ars Technica)) United

To guard against cyberattacks in space, researchers ask “what if?”

by The Conversation / 1d

Enlarge / Complex space systems like the International Space Station could be vulnerable to hackers. (credit: NASA ) If space systems such as GPS were hacked and knocked offline , much of the world would instantly be returned to the communications and navigation technologies of the 1950s. Yet space cybersecurity is largely invisible to the public at a time of heightened geopolitical tensions. Cyb

Amazon is bricking $2,350 Astro robots 10 months after release

Amazon discontinues Astro for Business

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86by Scharon Harding / 1d

(credit: Amazon) Amazon is bricking all Astro for Business robots on September 25. It first released the robot about eight months ago as a security device for small and medium-sized businesses (SMBs) for $2,350, but the device will soon be a pricey new addition to Amazon's failed products list. Amazon announced Astro in September 2021 as a home robot; that version of the device is still only avai

How the Lincoln Nautilus surprisingly won me over with its ride, huge screen

by Jonathan M. Gitlin / 1d

Enlarge / In the past, car companies engaged in "horsepower wars." Now it seems they're competing in a screen size war. (credit: Jonathan Gitlin) It's important to try to approach a review car with an open mind, but I'll admit my preconceptions were stacked against the Lincoln Nautilus. It's on the larger end of the midsize SUV segment, bigger than I like them, and my last encounter with a Lincol

SpaceX video teases potential Starship booster “catch” on next flight

40by Eric Berger / 1d

Enlarge / In early June, the rocket for SpaceX's fourth full-scale Starship test flight awaits liftoff from Starbase, the company's private launch base in South Texas. (credit: SpaceX) In a short video released Thursday , possibly to celebrate the US Fourth of July holiday with the biggest rocket's red glare of them all, SpaceX provided new footage of the most recent test of its Starship launch v

The “Netflix of anime” piracy site abruptly shuts down, shocking users

Animeflix popular piracy site closes

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by Ashley Belanger / 1d

The Fable Enlarge / Disney+ promotional art for The Fable , an anime series that triggered Animeflix takedown notices. (credit: Disney+) Thousands of anime fans were shocked Thursday when the popular piracy site Animeflix voluntarily shut down without explaining why, TorrentFreak reported . "It is with a heavy heart that we announce the closure of Animeflix," the site's operators told users in a

Judge says FTC lacks authority to issue rule banning noncompete agreements

Federal court halts FTC noncompete ban

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51by Jon Brodkin / 1d

Enlarge / FTC Chair Lina Khan testifies before the House Appropriations Subcommittee on May 15, 2024, in Washington, DC. (credit: Getty Images | Kevin Dietsch) A US judge ruled against the Federal Trade Commission in a challenge to its rule banning noncompete agreements, saying the FTC lacks "substantive" rulemaking authority. The preliminary ruling only blocks enforcement of the noncompete ban a

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