The world’s most advanced & fastest computer “Roadrunner” has been invented & developed through collaboration between workd’s famous IBM and the Los Alamos National Laboratory. It is able to perform 1000 trillion operations per second! It is being employed for the US nuclear programme, as well as for exploring the secrets of the universe, genomics and climate change. The machine is a giant—it occupies 6,000 square feet of space, has 10,000 connections which use 57 km of optical fibre and its 80 terabytes memory weighs 500,000 pounds!
Only 4.6 per cent of the mass of the universe is accounted for by the “ordinary” visible matter made of atoms. About 23 per cent of the matter is “dark matter” that is invisible but its presence can be deduced from the motion of galaxies. The remaining 73 pre cent of the universe is an even stranger component, “dark energy”. This is a huge unsolved mystery. Although dark matter cannot be seen directly, its presence can be indirectly sensed from the grasp on clusters of galaxies, holding them together. Dark energy also accounts for the manner in which the universe continues to expand at an accelerating pace.