The Large Hadron Collider is breaking records by smashing protons together at record energies. Discovery News' James Williams and Ian O'Neill explain what's going on and why it matters.
If backwards time travel was possible, could we change history? Or is the power of space and time so great that time travelers would be unable to alter even the smallest detail?
One theory suggests that the world may be made of something called Weakly Interacting Massive Particles or WIMPs, and the answer to this theory can be found underground.