Earth (Terra) is the third planet from the Sun. Humans live on it. According to radiometric dating and other sources of evidence, Earth formed over 4.5 billion years ago. The planet revolves around the Sun in 365.26 days. During this time, Earth rotates about its axis about 366.26 times.
Within the first billion years of Earth’s history, life appeared in the oceans and began to affect the Earth’s atmosphere and surface, leading to the proliferation of aerobic and anaerobic organisms. Some geological evidence indicates that life may have arisen as much as 4.1 billion years ago. Since then, the combination of Earth’s distance from the Sun, physical properties, and geological history have allowed life to evolve and thrive. In the history of the Earth, biodiversity has gone through long periods of expansion, occasionally punctuated by mass extinction events. Over 99% of all species that ever lived on Earth are extinct. Over 7.6 billion humans live on Earth and depend on its biosphere and natural resources for their survival.
This is a composite image of the Western hemisphere of the Earth.
Image Credits: NASA/ GSFC/ NOAA/ USGS
This t-shirt is everything you’ve dreamed of and more. It feels soft and lightweight, with the right amount of stretch. It’s comfortable and flattering for both men and women.