IST LINK CHANGE
So...our world didn't end in December 2012.
Instead...mark your next doomsday calendar for...2036...perhaps thanks to an asteroid...called Apophis.
On Wednesday...the 300 meter/1,000 ft wide icy rock passed just 14 million kms/9.3 mn miles near earth.
But...after some previous miscalculations...scientists say there is a small chance it will collide with earth...in 2036.
That impact would be like 500 megatons of TNT.
Apophis was first discovered in 2004...and its mass has been upgraded by 75%.