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94%VideoJan 2017

If we find aliens, what do we do next?

(13:30) History tells us that when two civilisations meet, it's usually bad news for one.


94%VideoJun 2011

The James Webb Space Telescope, largest most powerful telescope so far

(5:11) Due to launch in 2016, this incredible piece of technology will open our eyes to a better understanding of our cosmic history. It will look into the 'Dark Ages' of the cosmos to fill a critical gap in our current observations. Amazing machine perhaps, but is it worth the estimated six billion dollars it will cost? In the next video, nerd Hank Green tells you why he thinks it is.


94%VideoAug 2012

NASA control room during Curiosity's touchdown on Mars

(7:48) The rover has landed. Tense minutes at mission control as Curiosity descends to the surface of Mars.

94%VideoOct 2012

Michio Kaku: How to travel to other stars, so unimaginably far away

(2:50) Most people think of a huge fancy starship carrying generations of people across deep space. But maybe there's a better way.


94%VideoDec 2013

How astronomers detect alien atmospheres

(3:22) Considering the enormous distances involved, how do astronomers determine the size, mass and make up of a planet orbiting a distant star?

94%VideoNov 2017

Scientists detect first interstellar asteroid

(3:15) Unlike any other asteroid or comet observed in our solar system.


93%VideoMay 2007

Carl Sagan - cosmic calendar

History of the Universe in a single year


93%VideoOct 2007

Space toilet

Col. C Hadfield talks about having a weightless dump


93%VideoAug 2009

James May at the edge of space in a U2 spy plane

The world's highest flying aeroplane takes Captain Slow for an emotional ride of a lifetime. I think he found God.


93%VideoJun 2011

Space shuttle Endeavour parked at the International Space Station

(10:04) Video shot by European Space Agency astronaut Paolo Nespoli from the Russian Soyuz spacecraft after it undocked from the ISS beginning its return journey to Earth. It's amazing to think this is real and not Hollywood.