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New research, published by the National Physical Laboratory (NPL), takes a significant step towards changing the international definition of the kilogram – which is currently based on a lump of platinum-iridium kept in Paris. NPL has produced technology capable of accurate measurements of Planck's constant, the final piece of the puzzle in moving from a physical object to a kilogram based on fundamental constants of nature. The techniques are described in a paper published in Metrologia on the 20th February.

ABERDEEN, Scotland (AP) -Britain & Ireland won four straight singles matches to hold off a comeback by the United States and take a 7-5 lead going into the final day of the Walker Cup.

Leader Bubba Watson says the big challenge in the final round will be mental, not physical. (NBC Sports)

Scientists at a meeting in Grenoble, France, recently stoked speculation that physicists at the world's biggest particle accelerator may soon provide a first look at the elusive Higgs boson - the final piece of evidence needed to prove that the Standard Model of particle physics, which explains the behavior of subatomic particles, is correct.

Jay Haas birdied the final hole Sunday to win the 3M Championship by one shot over Tom Lehman, Kenny Perry and Peter Senior.

Tiger Woods finished his first tournament in four months with an even-par 70 at Firestone to finish in the middle of the pack at the Bridgestone Invitational.

Given the circumstances of a most peculiar year, the slogan of the final major — "Glory's Last Shot" — might not apply to Tiger Woods.

PGT: Tiger Woods endured another erratic day, bogeying two of the final three holes to shoot a 2-over 72 in the third round Saturday.

It’s tough to beat watching a spaceship lift off. But for us audio fans, there’s another sequence during launch preparation that’s awfully compelling

Chris Kirk won his first PGA Tour event with a one-stroke victory in the Viking Classic, shooting a 4-under 68 to beat Tom Pernice Jr. and George McNeill by one stroke

Darren Clarke of Northern Ireland shot a 1-under 69 Saturday and takes a one-stroke lead to the final round of the British Open.

GolfChannel: With 12 players separated by five shots heading into the final round of the British Open, we try to find the winner.

So Yeon Ryu won the U.S. Women's Open in a playoff Monday, defeating rival South Korean Hee Kyung Seo by three shots in a three-hole playoff to capture the championship.

Jeff Sluman dropped four strokes behind Jay Haas early in the final round of the First Tee Open and figured he was playing for second place at best.

The space shuttle era draws to a close with the final launch of shuttle Atlantis, planned for July 8 [More]