Boundaries between the continents of Earth Boundaries between the continents of Earth The boundaries between the continents of Earth are generally a matter of geographical convention. Several slightly different conventions are in use. The number of continents is most commonly considered seven but may range as low as four when the Americas and Afro-Eurasia are each considered a single continent. According to the definition of a continent in the strict sense, an island cannot be part of any continent, but by convention and in practice most major islands are associated with a continent. There are three overland boundaries subject to definition: While the isthmus between Asia
The Greatest Race on Earth The Greatest Race on Earth in July 2009, bringing the competition to a close. The Greatest Race on Earth The Greatest Race on Earth (GROE) was a four-part series of marathon races in a relay format, which included the Nairobi Marathon, Singapore Marathon, Mumbai Marathon and Hong Kong Marathon. It was created and sponsored by Standard Chartered in 2005. The total prize pool for the 2006–07 series was US$1.5 million. The competition was won by the team of four athletes who had the lowest cumulative time across the four marathons, with each team member competing in only one marathon as