Karl Bushby is walking 36,000 miles across four continents. He set off in November 1998.

Bushby claims that if he completes the walk, which will take over ten years, he will be the first person 'to complete an unbroken round the world walk'. He says he will have crossed 25 countries, six deserts and seven mountain ranges.

He expects to return to Hull in the UK in 2009.

For details of the journey see: www.earthtrekuk.net