Tiger Woods loses to Tim Clark

Tiger Woods loses to Tim ClarkMarana (Arizona, US), Feb. 27 : Golf champion Tiger Woods celebrated comeback from knee surgery after eight months at the Accenture Match Play Championship ended after two rounds Thursday with a 4-and-2 defeat to Tim Clark.

Even one moment of magic - a hole-out from the bunker on the 14th - couldn''t swing the momentum.

Woods made more mistakes down the stretch and couldn''t match the South African''s six birdies in 16 holes.

"I''ve played with Tiger a few times. You either let it get the best of you or you thrive on it," said Clark.

Nanomotors just got ten times faster

Washington, May 2: Arizona researchers have made a breakthrough development by making a new generation of sub-microscopic nanomotors that are up to 10 times more powerful than existing motors.

The development, say researchers led by Joseph Wang, is a big step forward to a practical energy source for powering tomorrow’s nanomachines.

Currently nanomotors, including so-called “catalytic nanomotors,” are made with gold and platinum nanowires and use hydrogen peroxide fuel for self-propulsion.

However, these motors are quite slow and inefficient for practical use and can only reach the top speeds of about 10 micrometers per second. One micrometer is about 1/25,000 of an inch or almost 100 times smaller than the width of a human hair.