Challenge of the Cold: The Equator is famed for its heat, but there are parts where the sun is challenged by snow and ice. Here, animals and plants must adapt, or die. (8 of 8) [S,AD]
Power of the Sun: Our sun is a protector, a nourisher and a giver of life to all the planet's creatures. But it can also be a tyrant - no more so than at the Equator. (7 of 8) [S,AD]
Challenge of Change: For much of the year, Africa's savannah bakes under the Equatorial sun. It's a drastic change for the equator's usually seasonless conditions. (6 of 8) [S,AD]
Paradox of the Andes: In the high Andes of Ecuador, every day is like summer, and every night is like winter. For life here, each day becomes a battle. (5 of 8) [S,AD]
Reef of Riches: The Indonesian archipelago has thousands of islands, atolls and the largest concentration of coral reefs in the world. How was it created? (4 of 8) [S,AD]
Power of an Ocean: The Equator is not only the line that divides the Earth, it is also the evolutionary powerhouse of the world. See its effect on the Galapagos. (1 of 8) [S,AD]