The formation of an atoll is a slow process that can take millions of years. It begins when an underwater volcano erupts, creating a buildup of lava on the seafloor. With continued eruptions, the lava continues to build until it breaks through the ocean's surface and forms an island.
The equator and the International Date Line cross in the area of Pacific Ocean. There is a tradition to celebrate the first sailor's crossing of the line.
T<span>he Great Migration (in East Africa, mainly Kenya and Tanzania) is principally herds of wildebeest and zebra following their food and water supply.</span>
