Blue Origin's rocket reuse achievement marred by upper stage failure

Blue Origin's rocket reuse achievement marred by upper stage failure

fivenewscrypto    avril 21, 2026   

The third flight of Blue Origin's heavy-lift New Glenn launcher began Sunday with the company's first successful reflight of an orbital-class booster, but ended with a setback for Jeff Bezos' flagship rocket, a key element in NASA's Artemis lunar program.

The 321-foot-tall (98-meter) New Glenn launch vehicle ignited its seven methane-fueled BE-4 engines at 7:25 am EDT (11:25 UTC) Sunday, beginning a slow climb from its launch pad at Cape Canaveral Space Force Station, Florida.

The main engines, each producing more than a half-million pounds of thrust, accelerated the rocket past the speed of sound in about a minute-and-a-half. Three minutes into the flight, the booster switched off its engines and fell away from New Glenn's upper stage, powered by two BE-3U engines burning liquid hydrogen and liquid oxygen.

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I’ve fired one of America’s most powerful lasers—here’s what a shot day looks like

I’ve fired one of America’s most powerful lasers—here’s what a shot day looks like

fivenewscrypto    avril 21, 2026   

If you walk across the open yard in front of the Physics, Math, and Astronomy building at the University of Texas at Austin, you’ll see a 17-story tower and a huge L-shaped building. What you won’t see is what’s underneath you. Two floors below ground, behind heavy double doors stamped with a logo that most students have never noticed, sits one of the most powerful lasers in the United States.

I was the lead laser scientist on the Texas Petawatt, or TPW as we called it, from 2020 to 2024. Texas Petawatt, which is currently closed due to funding cuts, was a government-funded research center where scientists from across the country applied for time to use specialized equipment. It was part of LaserNetUS, a Department of Energy network of high-power laser labs.

This type of laser takes a tiny pulse of light, stretches it out so it doesn’t blast optics to pieces, and amplifies it until, for a brief instant, it carries more power than the entire US electrical grid. Then it compresses the pulse back to a trillionth of a second to create a star in a vacuum chamber.

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Great white sharks are overheating

Great white sharks are overheating

fivenewscrypto    avril 20, 2026   

The evolutionary edge that fueled great white shark dominance for millions of years could soon become its greatest downfall.

The ocean’s most iconic predators maintain warmer body temperatures than the surrounding seawater and are paying an increasingly steep price for it. As the oceans warm due to climate change, they now face the risk of potentially fatal overheating, according to a new report in Science.

Several large tuna species and sharks, known as “mesothermic” species for the way their bodies run hot, require more fuel to maintain their temperature and are thus confronting a “double jeopardy” of warming oceans and declining food, mainly from overfishing. As water temperatures climb, these species will be forced to relocate to cooler waters.

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US-sanctioned currency exchange says $15 million heist done by "unfriendly states"

US-sanctioned currency exchange says $15 million heist done by "unfriendly states"

fivenewscrypto    avril 20, 2026   

Grinex, a US-sanctioned cryptocurrency exchange registered in Kyrgyzstan, said it’s halting operations after experiencing a $13 million heist carried out by “western special services” hackers.

Researchers from TRM, which has confirmed the theft, put the value of stolen assets at $15 million after discovering roughly 70 drained addresses, about 16 more than Grinex reported. Neither TRM nor fellow blockchain research firm Elliptic has said how the attackers slipped past Grinex’s defenses. Grinex said it has been under almost constant attack attempts since incorporating 16 months ago. The latest attacks, it said, targeted Russian users of the exchange.

Damaging "Russia's financial sovereignty"

“The digital footprints and nature of the attack indicate an unprecedented level of resources and technology available exclusively to the structures of unfriendly states,” Grinex said. “According to preliminary data, the attack was coordinated with the aim of causing direct damage to Russia's financial sovereignty.”

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Man with @ihackedthegovernment Instagram account tells judge, “I made a mistake"

Man with @ihackedthegovernment Instagram account tells judge, “I made a mistake"

fivenewscrypto    avril 20, 2026   

A 25-year-old Tennessee man avoided prison time after pleading guilty to accessing government systems with stolen login credentials and boasting of the deed on an Instagram account with the handle, @ihackedthegovernment.

Defendant Nicholas Moore accessed user accounts on the US Supreme Court's electronic filing system, AmeriCorps, and the Veterans Administration Health System. He then publicly posted screenshots of the users' personal information to his @ihackedthegovernment account on Instagram. It's unclear how he obtained the stolen login information.

Moore was sentenced to a year of probation today in US District Court for the District of Columbia. The US government had requested 36 months of probation for the unauthorized access that took place in 2023 from August to October. The government sentencing recommendation did not request any jail time or a fine.

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Trump picks qualified, normal health leader to head CDC; experts still cautious

Trump picks qualified, normal health leader to head CDC; experts still cautious

fivenewscrypto    avril 20, 2026   

President Trump on Thursday announced his third nominee for director of the Centers for Disease Control and Prevention: Dr. Erica Schwartz, a well-qualified former public health official and board-certified physician in preventive medicine, who has publicly supported vaccination and followed evidence-based medicine.

The uncontroversial pick comes amid concern within the administration that the aggressive anti-vaccine agenda from Health Secretary Robert F. Kennedy Jr.—who has no medical, science, or public health background—has become a liability for the party in the lead up to the midterms.

Schwartz was deputy surgeon general in Trump's first administration. She spent much of her career as a Navy officer, held the role of Chief Medical Officer with the US Coast Guard, and is a retired rear admiral of the US Public Health Service Commissioned Corps. She has a medical degree from Brown University, a master's degree in public health, and a law degree from the University of Maryland. During the pandemic, she was involved in the federal rollout of COVID-19 vaccines.

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$25,000 buys plenty of used EVs: Here are some options

$25,000 buys plenty of used EVs: Here are some options

fivenewscrypto    avril 20, 2026   

Whether you're considering an electric vehicle because of gas prices or climate change, there has probably never been a better time to buy a used EV, despite that the Trump administration abolished the used clean vehicle tax credit last year. When we started this ongoing series looking at used EV options, the initial idea was to see what was available at bargain-basement prices. But today we're looking at the $20,000–$25,000 bracket, and we're firmly out of the basement, with thousands of EVs across the country to choose from.

If you're only spending $5,000 on an EV, you're looking at much older models with smaller batteries that never had that much range even when new. But at four or five times that sum, the net casts much, much wider. Buyers can start being a little choosy here, particularly as ex-lease cars begin filling dealership lots this year.

For those in the market, it helps that EVs face lower residuals than equivalent hydrocarbon-powered cars. All those incentives given to the original purchaser are passed along to future owners, but according to a Deloitte report, EV residuals are underperforming even more than expected. While I might expect most Ars Technica readers to see the potential, "many US consumers remain cautious about range, charge time, price, battery replacement cost, and public charging access," says Deloitte. Changing that will require automakers and car salespeople to do a much better job explaining battery longevity and range, according to the consulting company.

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