What’s the News: Climate change may have sparked the demise of early Viking settlements in Greenland, according to a new study published online in the Proceedings of the National Academy of Sciences, when temperatures cooled rapidly over several decades. Around the time the Vikings disappear from the island’s archaeological record, temperature appears to have plunged. Nor were the Vikings the only people in Greenland whose fortunes rose and fell with the average temperature, the study suggests. Earlier cold spells may have played a role in the collapse of two previous groups on the island.

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A hacked page on PBS’s site announces the perpetrators.

What’s the News: On Sunday night, PBS found itself the victim of a cyber attack by the group LulzSec, which hacked PBS’s site in retaliation for a Frontline episode about WikiLeaks whose tone they found unfavorable. The first evidence? A post on the NewsHour blog alleging that rapper Tupac Shakur, who died in 1996, was still alive and well in New Zealand. PBS responded quickly, but as late as Monday night at about 5:50 pm, according to Boing Boing, LulzSec still had access to the site. Their motivation, the group says in an interview with Forbes, is a mixture of “lulz and justice.”

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What’s the News: Your phone can now be a credit card, thanks to Google Wallet, announced yesterday with great fanfare. With this system, when you swipe your phone over a sensor, a near-field communication (NFC) chip gives the merchant your credit card information. You punch in your PIN, and: cha-ching.

Google has partnered with 20,000 companies who will take payments this way, including Macy’s, American Eagle, and Subway.

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Since before the Great Pyramid of Giza was enumerated as a wonder of the world two millennia ago, people have pored over the mysteries of these vast tombs. Now, modern technology is helping researchers glean new insight into the pyramids, revealing them from far above and exploring them from deep within.

Satellite images have revealed 17 “lost” pyramids and thousands of ancient tombs and settlements in Egypt, according to a BBC News report. Using a new imaging technique, researchers could pick out the outlines of ancient buildings buried under the surface.

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Destruction in L’Aquila, in the seismically active area of Abruzzi.

What’s the News: No one can predict earthquakes. But six seismologists and a government official are being tried for manslaughter in the deaths of more than 300 people in the 2009 tremblor in L’Aquila, Italy. The city’s public prosecutor says the scientists downplayed the possibility of a quake to an extent that townsfolk did not take precautions that could have saved their lives. A judge has just set the trial to begin on September 20.

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What’s the News: A modified antibody can make its way into the brain and target the development of Alzheimer’s-inducing plaques, researchers reported today in two animal studies in Science Translational Medicine. The blood-brain barrier usually keeps drugs and other compounds from entering the brain in large enough quantities to be effective, but these studies show a way to trick the body’s own defenses into letting the drug in, demonstrating that this obstacle to treating Alzheimer’s could potentially be overcome.

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What’s the News: Bacteria are everywhere—in us, on us, around us. But they’re also floating around in the atmosphere, and researchers cracking open hailstones have now discovered them at the core, lending credence to the theory that bacteria jump-start the atmospheric process of forming snow, hail, and rain as a way to hitch a ride down to Earth.

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What’s the News: Metamaterials could improve wireless power transfer, letting us one day charge our devices without the hassle of cords and wires, says a study published last week in Physical Review B. While wireless power transfer already works to for tiny amounts of energy, metamaterials could theoretically be used to safely and efficiently boost the technique to handle more power, such as microwaves and lasers.

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The spam ecosystem.

What’s the News: Every day spammers are thinking up new ways to offer you “vIaGrA,” whether you have any interest or not, and spam filters have a tough time keeping up. Researchers studying what they call the “spam ecosystem” have outlined the processes and services spammers use in committing their nefarious deeds—going as far as to actually buy stuff in order to identify what banks they use—in hopes of finding new bottlenecks where regulators can disrupt spammers’ business model. Their findings? Hit ‘em where it hurts: their bank accounts.

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What’s the News: Adults and school-age children may understand some basic principles of geometry even without formal math training at all, according to a study published online yesterday by the Proceedings of the National Academy of Sciences. Thirty members of the Mundurucú, an indigenous Amazonian group, could intuitively grasp geometric concepts about angles, lines, and points, the researchers found.

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If you talk smack on Yelp, it’s coming down.

What’s the News: Sign here, here, here, and here—that’s the first thing your doctor’s office asks you to do. Chances are, you’re not reading the forms too closely. But tucked in there might be a little clause that goes something like this: “all your online reviews are belong to us.” And if you refuse to sign it, they’ll refuse to see you.

Doctors and dentists have started including this language, provided by an organization called Medical Justice, in their releases in an effort to keep negative online reviews from going up on sites like Yelp. But, as Ars Technica found, there are about a million different ways that this is both silly and pointless.

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What’s the News: Smart clothes might soon be coming into bed with you. A company is developing shirts endowed with a chip that senses the changes in breathing that accompany shifts in sleep phase, to help people track how variables like exercise, coffee intake, and stress affect their sleep.

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What’s the News: The bacterium that causes ulcers and some stomach cancers, Helicobacter pylori, could at least contribute to Parkinson’s disease, according to a new study in mice presented at a microbiology conference yesterday. Mice infected with H. pylori have shown Parkinson’s-like symptoms, building on earlier work that has suggested a link between the bacteria and Parkonson’s disease.

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What’s the News: Google’s self-driving cars have been generating buzz lately, with the news that the company has been lobbying Nevada to allow the autonomous vehicles to be operated on public roads. But it remains to be seen whether hordes of self-driving cars really going to work in the real world.

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In this images of infrared radiation in the days before the March 11 earthquake, the red circle indicates the epicenter and the red lines are tectonic faults.

What’s the News: Scientists analyzing the March 11 earthquake in Japan will have the benefit of some of the most sensitive and comprehensive atmospheric data yet, thanks to satellites monitoring climate. And a team has now reported a strange effect—a sudden spike in the temperature in the atmosphere above the quake site—detected just before the event. If the spike was related to the quake, and other earthquakes do the same thing, it might help scientists predict such cataclysms in the future.

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