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Scientists genuinely don't know what most of our universe is made of. The atoms we're made from only make up four per cent. The rest is dark matter and dark energy (for 'dark', read 'don't know'). The Large Hadron Collider at CERN has been upgraded. When it's switched on in March 2015, its collisions will have twice the energy they did before. The hope is that scientists will discover the identity of dark matter in the debris.

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Should I Eat Meat? How to Feed the Planet
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Allergies: Modern Life and Me
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Inside the Dark Web
Episode 4 - Inside the Dark Web
Ebola - The search for a cure
Episode 5 - Ebola - The search for a...
Is your Brain Male or Female?
Episode 6 - Is your Brain Male or Fem...
Secrets of the Solar System
Episode 7 - Secrets of the Solar Syst...
Aftershock: The Hunt for Gravitational Waves
Episode 8 - Aftershock: The Hunt for...
Dancing in the Dark - The End of Physics?
Episode 9 - Dancing in the Dark - The End of Physics?
70 Million Animal Mummies: Egypt's Dark Secret
Episode 10 - 70 Million Animal Mummies...
Is Binge Drinking Really That Bad?
Episode 11 - Is Binge Drinking Really...
The Trouble with Space Junk
Episode 12 - The Trouble with Space Ju...
Are Health Tests Really A Good Idea?
Episode 13 - Are Health Tests Really A...
First Britons
Episode 14 - First Britons
OCD: A Monster In My Mind
Episode 15 - OCD: A Monster In My Mind
Which Universe Are We In?
Episode 16 - Which Universe Are We In?
Cosmic Dawn: The Real Moment of Creation
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Are Video Games Really That Bad?
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