Three US based scientists have been awarded the 2013 Nobel Prize for chemistry.
It means that when developing new medicines, a computer can now show more accurately than a classic experiment how a drug would interact with the body to treat disease.
Computers are also able to understand chemical processes which happen at lightening speed from the purification of exhaust fumes to photosynthesis.
The Royal Swedish Academy of Sciences said the three had “made it possible to map the mysterious ways of chemistry by using computers”
They will receive their prize of 8 million crowns (920,000 euros) on the 10 December in Stockholm