Don't look down! Tomorrow the world's bravest man will try to cross the Grand Canyon on a tightrope with NO safety harness... but can he defy winds strong enough to down a helicopter | Mail Online
Saturday, June 22, 2013 - 02:30
in Mathematics & Economics
Nik Wallenda, the highwire artist who last year became the first person to cross Niagara Falls on a tightrope, will attempt to be the first to do the same over the world's most celebrated chasm.