NARRATOR: Three 13-year-olds from the UK are on their way to explore the geography of India. Dua, Amalia and Nayan are on a ten-hour flight to India a country of one and a quarter billion people ...

NARRATOR: It's late December. Three thirteen-year-olds from the UK are on their way to explore the geography of India. It's the trip of a lifetime, one that will challenge their preconceptions.

Great escarpments can be found in southern Africa, India, Brazil and Australia The mystery of how some of the Earth's most dramatic landforms came into being has been solved, scientists believe.