Blue Planet Biomes - Animals. The First Organisms Close to 2.5 billion years ago, the earth's surface and atmosphere were stable enough to support primitive life.
Single-cell organisms began to develop in the seas that covered the planet. World Climates. Some facts about climate The sun's rays hit the equator at a direct angle between 23 ° N and 23 ° S latitude.
Radiation that reaches the atmosphere here is at its most intense. In all other cases, the rays arrive at an angle to the surface and are less intense. The closer a place is to the poles, the smaller the angle and therefore the less intense the radiation. Our climate system is based on the location of these hot and cold air-mass regions and the atmospheric circulation created by trade winds and westerlies. World Atlas including Geography Facts, Maps, Flags - worldatlas.com.