EARTH
The Earth's oceans: Our blue heart and life support system
The oceans also play a vital role in regulating the Earth's climate and providing food and resources for billions of people.
The Earth's atmosphere : Composition of the atmosphere
The atmosphere protects us from harmful radiation from the Sun, helps Earth's temperature, and allows for life to exist on our planet.
The early Earth : The History of Earth
Earth has undergone a series of major transformations that have shaped our planet and the life that inhabits it.
Earth: A Gift from the Universe
Earth is about 4.5 billion years old and has been changing ever since. Sometimes changes happen very fast, like an earthquake.
