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Comment Tyson and Krulwich FTW (Score 1) 799

This is a no-brainer!

1. Check out Neil deGrasse Tyson, who hosts the excellent show Nova ScienceNOW, currently in it's third season. It runs just after NOVA for several weeks in a row.

2. Try Robert Krulwich, who co-hosts the great NPR show & podcast RadioLab, with the equally wonderful Jad Abumrad. They are great for driving and listening.

Both are brilliant at making complicated sciencey topics seem fun and interesting. My 13 year old daughter enjoys both shows immensely with me. RadioLab, especially, is fun and funny, and you can gather up all podcasts on iTunes (there are about 25 full shows presently, plus lots of smaller in-between podcasts).

Both of these guys appear frequently on public radio shows too, like Ira Flatow's Science Friday, which is also good but a little more current eventsy.

Hope you enjoy these!

First Acoustic Black Hole Created 165

KentuckyFC writes "One of the many curious properties of Bose Einstein Condensates (BECs) is that the flow of sound through them is governed by the same equations that describe how light is bent by a gravitational field. Now, a group of Israeli physicists have exploited this idea to create an acoustic black hole in a BEC. The team created a supersonic flow of atoms within the BEC, a flow that prevents any phonon caught in it from making headway. The region where the flow changes from subsonic to supersonic is an event horizon, because any phonon unlucky enough to stray into the supersonic region can never escape. The real prize is not the acoustic black hole itself but what it makes possible: the first observation of Hawking radiation. Quantum mechanics predicts that pairs of phonons with opposite momentum ought to be constantly springing in and out of existence in a BEC. Were one of the pair to stray across the event horizon into the supersonic region, it could never escape. However, the other would be free to go on its way. This stream of phononic radiation away from an acoustic black hole would be the first observation of Hawking radiation. The team hasn't gotten that far yet, but it can't be long now before either they or their numerous competitors make this leap."

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