Challengers for the US$1-million prize offered by the James Randi Educational Foundation for proving paranormal powers have just over two years left to claim the cash. Randi has announced that the paranormal-activity challenge, in which contestants must demonstrate their powers 'under proper observing conditions', will end on 6 March 2010 ? exactly 12 years after he first offered up the prize money.

Randi says that the challenge was intended to tempt high-profile paranormal-activity celebrities to come forward. In 2007, Randi changed the rules of the prize so that applicants were only eligible to enter if they had a media profile and some form of academic endorsement. But as the prize remains unclaimed, and the highest-profile celebrities have not entered, Randi would rather the million dollars were freed to be used elsewhere in his foundation, he says.