The 2012 Nobel prize in chemistry has gone to two US researchers whose work shed light on how the billions of cells in our body sense their environments.

Robert Lefkowitz and Brian Kobilka, both of the US, will share the prize of 8m Swedish kronor (�750,000; $1.2m).

Their work focuses on what are called G protein-coupled receptors, a number of proteins that reach through cell walls.

With this the total number of chemistry Nobel recipients have now reached 163, since they started in 1901...

Amazing discovery that will lead to amazing new technologies.