But concern has been emerging for some time about certain types of metal-on-metal hips, in particular those where the ball head has a diameter of 36mm or more.

BBC: Annual checks for patients with all-metal hips

If the record is confirmed, an 18 ft diameter hollowed out golf ball will be constructed to sit atop the tee, from where golfers will be able to tee off.

CNN: February 5, 2013 -- Updated 1840 GMT (0240 HKT)

The meteor was one yard in diameter, about the size of an exercise ball, when it entered the atmosphere over eastern Pennsylvania, said Cooke.

CNN: Meteor lights up East Coast -- and social media

Its leafy green head is usually 1-2 inches in diameter, roughly the size of a golf ball, but each sprout packs a potent punch of contrasting flavors.

NPR: Turning a New Leaf on a Misunderstood Sprout