Researchers at Durham University and the UK’s Nautical Almanac Office compiled nearly 3, 000 years of celestial records and found that with every passing century, the day on Earth lengthens by two milliseconds as the planet’s rotation gradually winds down. The Guardian reports: The split second gained since the first world war may not seem much, but the time it takes for a sunbeam to travel 600km towards Earth can cost an Olympic gold medal, as the American Tim McKee found out when he lost to Sweden’s Gunnar Larsson in 1972. For those holding out for a whole extra hour a day, be prepared for a long wait. Barring any change in the rate of slowing down, an Earth day will not last 25 hours for about two million centuries more. Researchers at Durham University and the UK’s Nautical Almanac Office gathered historical accounts of eclipses and other celestial events from 720BC to 2015. The oldest records came from Babylonian clay tablets written in cuneiform, with more added from ancient Greek texts, such as Ptolemy’s 2nd century Almagest, and scripts from China, medieval Europe and the Arab dominions. The ancient records captured the times and places that people witnessed various stages of solar and lunar eclipses, while documents from 1600AD onwards described lunar occultations, when the moon passed in front of particular stars and blocked them from view. To find out how the Earth’s rotation has varied over the 2, 735-year-long period, the researchers compared the historical records with a computer model that calculated where and when people would have seen past events if Earth’s spin had remained constant. The astronomers found that Earth’s spin would have slowed down even more had it not been for a counteracting process. Since the end of the most recent ice age, land masses that were once buried under slabs of frozen water have been unloaded and sprung back into place. The shift caused the Earth to be less oblate — or squished — on its axis. And just as a spinning ice skater speeds up when she pulls in her arms, so the Earth spins faster when its poles are less compressed. Changes in the world’s sea levels and electromagnetic forces between Earth’s core and its rocky mantle had effects on Earth’s spin too, according to the scientists’ report in Proceedings of the Royal Society. Read more of this story at Slashdot.
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Earth’s Day Lengthens By Two Milliseconds a Century, Astronomers Find
An anonymous reader writes: The NY Times is covering a new paper in the journal BMJ which re-analyzed data from a 2001 paper, coming to the opposite conclusions of the earlier study. The BMJ paper covers the effectiveness and safety of two antidepressant drugs for adolescent use, and the authors were able to re-analyze the original data after the release of previously confidential documents. The BMJ editors call into question some of the integrity of previous publishing, noting that none of the authors listed on 2001 paper actually wrote the original manuscript, and call for results of clinical trials to be made freely available so the science community can verify and self-correct results. The BMJ has released the study and provided an accompanying press release (PDF). Read more of this story at Slashdot. 
The 10, 000 hours of practice rule suggests that it takes about 10, 000 hours of practice to master any skill. It’s often cited as a guideline for the purpose of deliberate practice, but according to a study from Princeton, that number’s probably not right. Read more… 
itwbennett writes: Personal information, including Social Security numbers and call records, was accessed for an unknown number of AT&T Mobility customers by people outside of the company, AT&T has confirmed. The breach took place between April 9-21, but was only disclosed this week in a filing with California regulators. While AT&T wouldn’t say how many customers were affected, state law requires such disclosures if an incident affects at least 500 customers in California. Read more of this story at Slashdot. 
mikejuk writes “A recent paper by Dr Rob Jenkins of the Department of Psychology at York University (UK) has managed to prove that you can get useful images of faces from the reflections in eyes. It really is as simple as zooming in. The catch is that the experiments were done with a 39 mega pixel camera — even so the actual final images were low resolution. In the experiment a number of people were photographed with a ‘bystander’ in a position so that a reflection of their face would be captured in the eye. The resulting extracted image of the reflection in the eye was only 27×36 and then rescaled using bicubic interpolation to 400×240 or bigger and enhanced using standard PhotoShop operations to normalize the contrast and brightness. Test subjects were able to match faces using the low resolution images but the important result was that if the subject knew the person in the photo then recognition went up to 90% with false positives down at 10%. So the next time you appear in a photo consider the fact that a simple procedure might reveal who you are with.” Read more of this story at Slashdot. 
