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Submission + - A carbon fibre e-bike: built for Batman (theguardian.com)

turkeydance writes: Made of carbon-fibre and serious gadgetry, the Visiobike looks as if Batman decided to fight crime on low emissions. Its makers are billing it as a 'high-tech electric bicycle' and it certainly comes with a range of bells and whistles (but disappointingly it lacks an actual bell). The bike is controlled via a handlebar-mounted smartphone, giving riders the chance to stuff yet another aspect of their life into an app.

Submission + - Astronomers Solve Puzzle Of Mysterious Streaks In Radio Images Of The Sky 2

KentuckyFC writes: Back in 2012, astronomers constructed an array of 256 radio antennas in the high deserts of New Mexico designed to listen for radio waves produced by gamma ray bursts, one of the most energetic phenomena in universe and thought to be associated with the collapse of a rapidly rotating stars to form neutron stars and black holes. The array generates all sky images of signals produced in the 25 MHz to 75 MHz region of the spectrum. But when researchers switched it on, they began to observe puzzling streaks across the sky that couldn't possibly be generated by gamma ray bursts. One source left a trail covering more than 90 degrees of the sky in less than 10 seconds. This trail then slowly receded to an endpoint which glowed for around 90 seconds. Now the first study of these transient radio signals has discovered that they are almost certainly produced by fireballs as they burn up after entering the Earth's atmosphere. The conclusion comes after the researchers were able to match several of the radio images with visible light images of fireballs gathered by NASA's All Sky Fireball Network. That solves the mystery but not without introducing another to keep astrophysicists busy in future. The question they're scratching their heads over now is how the plasma trails left by meteors can emit radio waves at this frequency.

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