Earth formed around 4.54 billion years ago and is the third planet from the Sun. It is the fifth largest planet in the solar system and the largest of the terrestrial planets. It is also the densest of all the planets.
Gaylord Nelson founded Earth Day. It was renamed officially by the U.N. in 2009 as International Mother Earth Day, and some schools and communities celebrate the day for an entire week. Also, the first Earth Day was celebrated on April 22, 1970.
One interesting fact about Earth is its status as the fifth planet in terms of size but the densest of all. It also ranks as the largest of the terrestrial planets in the solar system and the only one on which water exists in liquid form on its surface.
Earth is the only planet that has liquid water on its surface, it is 93 million miles from the sun, and the Atlantic Ocean is the saltiest of the oceans. Earth is a unique planet in the solar system.
Earth Day began in the late 1960s following the Vietnam War and was originally created with political aims. The Earth Day holiday on April 22 actually follows the first Earth Day of the year on March 20, the spring equinox.
Earth is the only planet in the solar system not named after a Roman or Greek deity. The hottest recorded temperature is 136 degrees Fahrenheit. Scientists believe that Earth once had two moons. The longest mountain range on the planet is underwater and is called the mi...
Earth's crust is both the outermost and the thinnest of the planet's layers, is composed mostly of oxygen and silicon, and is where the most ancient rock samples in the world have been found. Overall our planet's crust ranges from 3 to 44 miles in thickness, extending t...