miércoles, 26 de noviembre de 2014

BBC Horizon Project Poltergeist (Missing Neutrinos) - Full Documentary



This is the story of two genuine scientific heroes. For forty years, John Bahcall and Ray Davis were engaged in a single extraordinary experiment - to find out why the Sun shines. In the end they would triumph. Davis would win the Nobel Prize and, thanks to their work, a whole new theory about how the universe is put together may have to be created.

At the heart of this story is a tiny, utterly mysterious thing called a neutrino. Trillions of them pass through your body every second, touching nothing, leaving no trace. Yet neutrinos are one of a handful of fundamental particles in the universe, essential to every atom in existence and clues to what makes the Sun work. But their ghost-like quality made trapping and understanding them immensely difficult.

What then followed was a bizarre series of experiments. They led from a vat containing 600 tons of cleaning fluid, to a vast cavern in a Japanese mountain, to a hole in the ground in Canada two kilometres deep.

What they would reveal would stun the world of science. It seems that neutrinos may be our parents. They may be the reason why everything, including us, exists.

BBC Horizon 2014-2015 Episode 4: Inside the Dark Web



Twenty-five years after the world wide web was created, it is now caught in the greatest controversy of its existence: surveillance.

With many concerned that governments and corporations can monitor our every move, Horizon meets the hackers and scientists whose technology is fighting back. It is a controversial technology, and some law enforcement officers believe it is leading to 'risk-free crime' on the 'dark web' - a place where almost anything can be bought, from guns and drugs to credit card details.

Featuring interviews with the inventor of the world wide web, Sir Tim Berners-Lee, and the co-founder of WikiLeaks, Julian Assange, Horizon delves inside the 'dark web'.

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Features contributions from: Alex Hawkinson, Joss Wright, Tim Berners-Lee, Julia Angwin, Julian Assange, Jacob Appelbaum, Bruce Schneier, David Chaum, Paul Syverson, Jon Iadonisi, Thomas Olofsson, Peter Todd, Troels Oerting, Eugene Kaspersky, Steve Crocker and Rick Lamb.

Covers: Internet of Things, Privacy, Encryption, Wikileaks (incl. Edward Snowden), Tor, Bitcoin, Silk Road

English (UK) subtitles are available.