Northern Lights: Timelapse shows Aurora Borealis from space - BBC News. Men With Smaller Testicles Are Better Fathers, Study Says. Perhaps it’s time to stop obsessing over penis size, and start to think more about those underloved lads underneath. A new study has suggested that testicle size plays a role in whether or not a guy is an involved dad, but this is one time less is more: the smaller the family jewels, the better the family man. Prior research has already suggested that dudes with higher testosterone levels are less into raising kids, but this study, which was published in the Proceedings of the National Academy of Sciences on Monday, is the first to find an independent correlation between testicle volume and parenting. As with other seed-bearing nuts, testicle size determines how much juice is produced, and it seems there’s a kind of law of diminishing returns at work.
The greater the semen output in each ejaculation, the smaller the parenting output later on. That matters — a lot. (MORE: In a Rush to Mature: Study Finds Boys Hitting Puberty Earlier Than Ever) (MORE: Too Old to Be a Dad?) This Satellite Could Be Beaming Solar Power Down from Space by 2025. In the third century BCE, King Hiero II of Syracuse asked Archimedes to devise a number of death traps to thwart Roman invaders. Among the many designs the great inventor drew up was a solar death ray. The basic idea was to build an array of mirrors that could reflect rays of light into a central blast, causing Roman ships to burst into flame. It's unlikely the weapon ever made it past the blueprint stage, but it became an incredibly influential model nonetheless.
Archimedes was perhaps the first solar power convert, searching for a way to take advantage of the inconceivable amount of energy our friendly neighborhood star barfs up every second. The only thing that would make Archimedes' solar death ray more fascinating is if it was technically feasible, socially benevolent, and in space. That's where John Mankins comes in. I recently caught up with Mankins to discuss the SPS-ALPHA's progress and potential. Via. La-to-san-francisco-in-30-minutes-paypal-founder-elon-musk-unveils-800mph-hyperloop-trains-8758316. Mr Musk, who published the plans for his ultra-high-speed alternative in a blog post, said it could be delivered to consumers far more cheaply than plane travel, and with the regularity of trains.
The 42-year-old tech mogul inspired Robert Downey Jr’s performance as genius industrialist Tony Stark in the movie versions of Marvel Comics’ Iron Man. He founded Paypal; the high-end electric car-maker Tesla Motors; and SpaceX, a space exploration venture. His stated aim is to establish an 80,000-person colony on Mars. Mr Musk first mentioned the Hyperloop more than a year ago, suggesting his invention would be solar-powered, safe and reliable regardless of weather conditions.
He has described the technology involved as a “cross between Concorde, a rail gun and an air hockey table”. In an interview with Bloomberg Businessweek, Mr Musk said the tubes would be mounted above ground on columns. A sketch of Elon Musk's proposed "Hyperloop" transport system On the right track: High-speed railways. BBC NEWS | Science/Nature | 47 year old television signals bouncing back to Earth.
While searching deep space for extra-terrestrial signals, scientists at the Arecibo Observatory in Puerto Rico have stumbled across signals broadcast from Earth nearly half a century ago. Radio astronomer Dr. Venn described how he made the historic discovery after analysing a number of signals originating from the same point in space. "I realised the signal was in the VHF Band and slap bang in the middle of 41-68 MHz. It was obviously old terrestrial television broadcasts, but they seemed to be originating from deep space. " After boosting and digital enhancement the resulting video signals are remarkably clear.
Responding to questions, Dr Venn was at pains to explain that little green men are not showing repeats of old Earth shows. A BBC team have been working closely with Dr Venn's team to help recover the signals. The BBC will be archiving all the recordings recovered from space and there are plans to broadcast some of the highlights later in the year. Most Earthlike Planets Found Yet: A "Breakthrough" Planet hunters are significantly closer to their goal of finding an "Earth twin" with the discovery of two planets similar in size to our own, astronomers with NASA's Kepler mission announced today. The planets, described at a NASA press conference, orbit a sun that's cooler than ours but is at the right distance to allow water to remain liquid, which is considered essential for a planet to support life.
(Read about a related discovery in 2011: "NASA's Kepler Finds Two Earth-Size Planets Around Sunlike Star. ") And because of their sizes and orbits, the newfound planets are likely either rocky—like Earth—or watery, NASA scientists said. The two planets are located 1,200 light-years away in a five-planet system orbiting a star dubbed Kepler-62. Called Kepler-62e and -62f, the planets "are by far the best candidates for habitability of any found so far," said William Borucki of NASA's Ames Research Center, the science principal investigator for the agency's Kepler Space Telescope.
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No matter what, a silicon solar cell can never generate more than one electron from a single photon. Such harsh quantum realities severely limit the conversion efficiency of photovoltaic cells, and scientists have spent decades looking for work-arounds. Now, researchers at the Massachusetts Institute of Technology’s Center for Excitonics have published a compelling case that the key to greater solar efficiency might be an organic dye called pentacene. The key is a phenomenon called singlet-exciton fission, in which an arriving photon generates two “excitons” (excited states) that can be made to yield two electrons. Why it works is still not particularly clear, and for now, the pentacene cell works only with an extremely narrow band of visible light.