5 super-cool supercomputers

It reached the number one spot on the "Top500 List" in November, but Titan has already been bumped down to second place.

Titan resides at the U.S. Department of Energy's Oak Ridge National Laboratory and helps scientists pioneer research into climate change, bio fuels and nuclear energy.

The supercomputer was manufactured by the American-based company Cray (CRAY) and has clocked in at 17.6 petaflops. Titan outperforms its closest competitor, another American computer called the Sequoia, by less than one petaflop and is one of the most energy efficient systems on the list.

The United States hosts 253 of the 500 supercomputers on the list -- more than any other country.

NEXT: K Computer (Japan)