Briton Mark Beaumont began his world record attempt to cycle around the globe in 80 days on Sunday (July 2) at 0200GMT in Paris, France.
Beaumont is looking to cycle around 18,000 miles (29,000km) across the planet.
His trip will see him crossing east across Europe through Poland, Russia, Mongolia and China before hopping onto a plane and cycling from Perth to Brisbane across the deserts of Australia and cycling again through New Zealand before crossing North America from Alaska to eastern Canada and finally starting again from Lisbon and cycling back to Paris.
He aims to cycle around 16 hours every day.
Beaumont managed to cycle around the world in 194 days back in 2008 and is aiming to be more than twice as quick. The current record is held by New Zealander Andrew Nicholson who in 2015 managed the feat in 123 days.