netbuzz (955038) writes “Three years ago today, software consultant Sohaib Athar was working on his laptop at home in Pakistan when he tweeted: ‘Helicopter hovering above Abbottabad at 1AM (is a rare event).’ And then: ‘A huge window-shaking bang here in Abbottabad Cantt. I hope it’s not the start of something nasty :-S.’ It was for Osama bin Laden. Today Athar says, ‘People do bring it up every now and then.'” Read more of this story at Slashdot.
See the original article here:
The Guy Who Unknowingly ‘Live-Blogged’ the Bin Laden Raid
KentuckyFC (1144503) writes “In June 1972, nuclear scientists at the Pierrelatte uranium enrichment plant in south-east France noticed a strange deficit in the amount of uranium-235 they were processing. That’s a serious problem in a uranium enrichment plant where every gram of fissionable material has to be carefully accounted for. The ensuing investigation found that the anomaly originated in the ore from the Oklo uranium mine in Gabon, which contained only 0.600% uranium-235 compared to 0.7202% for all other ore on the planet. It turned out that this ore was depleted because it had gone critical some 2 billion years earlier, creating a self-sustaining nuclear reaction that lasted for 300, 000 years and using up the missing uranium-235 in the process. Since then, scientists have studied this natural reactor to better understand how buried nuclear waste spreads through the environment and also to discover whether the laws of physics that govern nuclear reactions may have changed in the 1.5 billion years since the reactor switched off. Now a review of the science that has come out of Oklo shows how important this work has become but also reveals that there is limited potential to gather more data. After an initial flurry of interest in Oklo, mining continued and the natural reactors–surely among the most extraordinary natural phenomena on the planet– have all been mined out.” Read more of this story at Slashdot. 
kelk1 sends this article from the Stanford News Service: “Stanford bioengineers have developed faster, more energy-efficient microchips based on the human brain – 9, 000 times faster and using significantly less power than a typical PC (abstract). Kwabena Boahen and his team have developed Neurogrid, a circuit board consisting of 16 custom-designed ‘Neurocore’ chips. Together these 16 chips can simulate 1 million neurons and billions of synaptic connections. The team designed these chips with power efficiency in mind. Their strategy was to enable certain synapses to share hardware circuits. … But much work lies ahead. Each of the current million-neuron Neurogrid circuit boards cost about $40, 000. (…) Neurogrid is based on 16 Neurocores, each of which supports 65, 536 neurons. Those chips were made using 15-year-old fabrication technologies. By switching to modern manufacturing processes and fabricating the chips in large volumes, he could cut a Neurocore’s cost 100-fold – suggesting a million-neuron board for $400 a copy.” Read more of this story at Slashdot. 
