Starting on April 10, Amazon Prime subscribers will pay $5 per month for ad-free Prime Video without ads, up from the current $3 per month on top of their Prime subscription, Amazon announced today.

On that date, Amazon will introduce a new ad-free Prime Video subscription tier called “Prime Video Ultra.” Amazon will also increase the number of simultaneous streams supported by the tier from three to five and the number of downloads permitted from 25 to 100.

Currently, Prime Video with ads is part of Amazon’s Prime membership, which starts at $15 a month. Today, ad-free Prime Video users can watch supported titles in 4K, but starting on April 10, a new Prime Video Ultra subscription will be required for 4K viewing.

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One of our favorite TV shows last year was Daredevil: Born Again , Marvel’s revival of the hugely popular series in the Netflix Defenders universe. Who could resist the magical combination of Charlie Cox as Matt Murdock/Daredevil and Vincent D’Onofrio as his nemesis, crime lord Wilson Fisk/Kingpin? The series quickly earned critical raves and a second season . And Marvel has released a short trailer in advance of the S2 premiere later this month.

(Some spoilers below for the first season.)

Sure, the fans were shocked when the pilot episode killed off Matt’s best friend and law partner, Foggy Nelson (Elden Hensen), in the first 10 minutes, with his grief-stricken law partner, Karen Page (Deborah Ann Woll), taking her leave from the firm by the pilot’s end. But that creative choice cleared the decks to place the focus squarely on Matt’s and Fisk’s parallel arcs. Matt decided to focus on his legal work while Fisk was elected mayor of New York City, intent on leaving his criminal life behind. But each struggled to remain in the light as the dark sides of their respective natures fought to be released. The result was an entertaining, character-driven series that feels very much a part of its predecessor while still having its own distinctive feel.

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Alvarezsaurids were mostly small-bodied theropods that paleontologists originally misinterpreted as early flightless birds, only to later recognize them as an ant-eating lineage of non-avian dinosaurs. For years, we suspected that Alvarezsaurids underwent a rare process of evolutionary miniaturization directly coupled to a diet of social insects like ants and termites. It was a tidy hypothesis: They got smaller to become more efficient at catching ants.

Now, a recently discovered fossil of one of the smallest alvarezsaurids ever found suggests that the evolution of miniature dinosaurs likely wasn’t as neat and linear as we thought. This new species, called Alnashetri cerropoliciensis , probably did not feed on ants at all. “It was a pursuit predator actively hunting insects and small mammals,” said Peter Makovicky, a paleontologist at the University of Minnesota.

The oddball

Alverezsaurids, found mostly in the Late Cretaceous rocks of Asia and South America, had short forelimbs tipped with a single oversized thumb claw built for digging. They also had minute teeth and sensory adaptations akin to those in modern nocturnal birds—everything necessary to work on termite mounds. “The explanation of their small body size has been tied to this specialization,” Makovicky explained.

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Deep in the Angolan Highlands lurks a rumored new species of elephant. Conservationist and ornithologist Steve Boyes has been searching for this elusive herd for years and the story of his journey is the focus of Ghost Elephants , a haunting, evocative documentary directed by Werner Herzog . The film debuted at the Venice International Film Festival last summer and is now coming to National Geographic and Disney+.

It might seem unusual for an ornithologist to embark on a quest to find remote pachyderms, but for Boyes the connection is perfectly natural.  He grew up in South Africa and wanted nothing more than to be an explorer, just like the people he read about every month in National Geographic magazine. "I grew up waiting for the magazine to arrive; I wanted the maps," Boyes told Ars. "Those would become my garden, or the field beyond, or the river—wild places imagined and real."

Boyes' parents frequently took him and his brother out into the wild, including visits to Botswana and Tanzania. "We used to embed ourselves in baboon troops and walk with impalas," said Boyes, and while his brother feared elephants, Boyes was walking with them from a young age. Ghost Elephants contains some gorgeous underwater footage of elephant feet plodding through the water, and elephants swimming on their sides, behavior that matches Boyes' own experiences with the animals. Under the right circumstances, if they don't feel threatened, elephants "will come and swim around you and with you and interact with you," he said. "So elephants have always fascinated me."

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The Spinosaurus is a sail-backed, crocodile-snouted dinosaur that Hollywood depicted as a giant terrestrial predator capable of taking down a T. rex in Jurassic Park 3 . Then they changed their mind and made it a fully aquatic diver in Jurassic World Rebirth —a rendering that was more in line with the latest paleontological knowledge.

But now, deep in the Sahara Desert, a team of researchers led by Paul C. Sereno, a paleontologist at the University of Chicago, discovered new Spinosaurus fossils suggesting both scientists and filmmakers might have got it all wrong again. The Spinosaurus most likely wasn’t an aquatic diver because, apparently, it couldn’t dive.

Bones in the sand

While the T. rex -beating version of the Spinosaurus was considered unlikely due to its relatively fragile skull, the newer depiction as an aquatic diver made more sense in light of paleontological evidence. Until now, all remains of these predators were pulled from coastal deposits near ancient seas and oceans. That geographic distribution was consistent with the aquatic lifestyle interpretation . If a creature lived on the coast, maybe it swam out to sea like a prehistoric seal, only crawling out to the beaches to rest just as it was depicted in Jurassic World Rebirth .

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For decades, satellites, drones , and human spotters have all been part of war’s surveillance and reconnaissance tool kit. In an age of cheap, insecure, Internet-connected consumer devices, however, militaries have gained another powerful set of eyes on the ground: every hackable security camera installed outside a home or on a city street, pointed at potential bombing targets.

On Wednesday, Tel Aviv–based security firm Check Point released new research describing hundreds of hacking attempts that targeted consumer-grade security cameras around the Middle East —with many apparently timed to Iran's recent missile and drone strikes on targets that included Israel, Qatar, and Cyprus. Those camera-hijacking efforts, some of which Check Point has attributed to a hacker group that's been previously linked to Iranian intelligence, suggest that Iran's military has tried to use civilian surveillance cameras as a means to spot targets, plan strikes, or assess damage from its attacks as it retaliates for the US and Israeli bombings that have sparked a widening war in the region.

Iran wouldn't be the first to adopt that camera-hacking surveillance tactic. Earlier this week, the Financial Times reported that the Israeli military had accessed “nearly all” the traffic cameras in Iran's capital of Tehran and, in partnership with the CIA, used them to target the air strike that killed Ayatollah Ali Khamenei, Iran’s supreme leader. In Ukraine, the country's officials have warned for years that Russia has hacked consumer surveillance cameras to target strikes and spy on troop movements—while Ukrainian hackers have hijacked Russian cameras to surveil Russian troops and perhaps even to monitor its own attacks .

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In his 1961 novel The Winter of Our Discontent, John Steinbeck wrote of loss, "It's so much darker when a light goes out than it would have been if it had never shone."

The death of NASA's Exploration Upper Stage today represents the inverse of that sentiment. The world of spaceflight is so much brighter now that its light has gone out.

The rocket's death came via a seemingly pedestrian notice posted on a government procurement website: "NASA/MSFC intends to issue a sole source contract to acquire next-generation upper stages for use in Space Launch System (SLS) Artemis IV and Artemis V from United Launch Alliance (ULA)."

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Planet Labs, one of the world's leading commercial satellite imaging companies, said Friday it is placing a hold on releasing imagery of some parts of the Middle East as a regional war enters its second week.

The company, which brands itself as Planet, operates a fleet of several hundred Earth-imaging satellites designed to record views of every landmass on Earth at least once per day. Its customers include think tanks, NGOs, academic institutions, news media, and commercial users in the agriculture, forestry, and energy industries, among others.

Planet also holds lucrative contracts selling overhead imagery to the US military and US government intelligence agencies.

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Until 1970, the US dumped an estimated 17,000 tons of unspent chemical weapons from World War I and II off the coast of the Atlantic Ocean—and that disposal decision continues to haunt commercial fishing operations.

In an article published this week in the Morbidity and Mortality Weekly Report, health officials from New Jersey and the Centers for Disease Control and Prevention report that there were at least three incidents of commercial fishing crews dredging up dangerous chemical warfare munitions (CWMs) off the coast of New Jersey between 2016 and 2023.

The three incidents exposed at least six crew members to mustard agent, which causes blistering chemical burns on skin and mucous membranes. (An example of these types of burns can be seen here , but be warned, the image is graphic.) One crew member required overnight treatment in an emergency department for respiratory distress and second-degree blistering burns. Another was burned so badly that they were hospitalized in a burn center and required skin grafting and physical therapy.

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