Explanation: What's up on planet Earth? A truly global answer has now been created by the Global Land One-km Base Elevation (GLOBE). Planet Earth is the birthplace of humanity, the cradle of human This means that every four years (in what is known as a Leap Year), the Earth calendar must include . Earth's atmosphere is made up of five main layers – the. Related Author: Karen BishopA spiritual writer for over ten years, I have written hundreds of articles about our spiritual evolutionary process, along with ten.