Probably nothing.
No, the Large Hadron Collider is not going to end the world. It is a scientific experiment designed to study particles and forces in the universe. The safety of the collider has been extensively studied and there is no credible evidence to suggest it poses any danger to the world.
As of the latest experiment at the Large Hadron Collider, approximately 150 femtobarns of data have been collected.
The first experiments were done mainly to check that the Large Hadron Collider itself worked at all. Later experiments will then do the actual data collection, from the collisions.
the hadron collider has a diameter of 3.8 metres and has a circumference of 17 miles (27 kilometres)
No you can find updates on the Large Hadron Collider's (LHC) progress at the link below.
CERN's Large Hadron Collider has been repaired and is in full operation. (January 2012)
No. As far as is known there are no aliens. The large hadron collider is a research tool, not a weapon.
The Large Hadron Collider (LHC) weighs approximately 38,000 tonnes, which is equivalent to about 84 million pounds.
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Large Hadron Collider
27 km
yes