Is Everything We Know About the Universe Wrong?

There's something very odd going on in space - something that shouldn't be possible. It is as though vast swathes of the universe are being hoovered up by a vast and unseen celestial vacuum cleaner. Sasha Kaslinsky, the scientist who discovered the phenomenon, is understandably nervous: 'It left us quite unsettled and jittery' he says, 'because this is not something we planned to find'. The accidental discovery of what is ominously being called 'dark flow' not only has implications for the destinies of large numbers of galaxies - it also means that large numbers of scientists might have to find a new way of understanding the universe. Dark flow is the latest in a long line of phenomena that have threatened to rewrite the textbooks. Does it herald a new era of understanding, or does it simply mean that everything we know about the universe is wrong?

Other episodes for this season

Do I Drink Too Much?
Episode 1 - Do I Drink Too Much?
The Secret You
Episode 2 - The Secret You
Fix Me
Episode 3 - Fix Me
Who's Afraid of a Big Black Hole?
Episode 4 - Who's Afraid of a Big Bla...
Why Do We Talk?
Episode 5 - Why Do We Talk?
How Long is a Piece of String?
Episode 6 - How Long is a Piece of St...
The Secret Life of the Dog
Episode 7 - The Secret Life of the Do...
Why Do Viruses Kill?
Episode 8 - Why Do Viruses Kill?
Pill Poppers
Episode 9 - Pill Poppers
Don't Grow Old
Episode 10 - Don't Grow Old
To Infinity and Beyond
Episode 11 - To Infinity and Beyond
What Makes a Genius?
Episode 12 - What Makes a Genius?
Did Cooking Make Us Human?
Episode 13 - Did Cooking Make Us Human...
Is Everything We Know About the Universe Wrong?
Episode 14 - Is Everything We Know About the Universe Wrong?