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The first eon in Earth's history, the Hadean, begins with the Earth's formation and is followed by the Archean eon at 3.8 Ga. [2]: 145 The oldest rocks found on Earth date to about 4.0 Ga, and the oldest detrital zircon crystals in rocks to about 4.4 Ga, [34] [35] [36] soon after the formation of the Earth's crust and the Earth itself.
The History Channel released the original documentary film to Region 1 DVD through Warner Home Video on April 15, 2008, and to Blu-ray through A&E Home Video on May 26, 2009. [1] [2] The television series premiered on February 10, 2009. Each 45-minute episode focuses on different geologic features and processes of the Earth. The first season ...
The Earth of the early Archean may have had a different tectonic style. It is widely believed that the early Earth was dominated by vertical tectonic processes, such as stagnant lid , [ 19 ] [ 20 ] heat-pipe , [ 21 ] or sagduction , [ 22 ] [ 23 ] [ 24 ] which eventually transitioned to plate tectonics during the planet's mid-stage evolution.
Tectonic plates are made up of Earth’s crust and the rigid top layer of the mantle, known as the lithospheric mantle. The planet has around a dozen large and irregularly shaped tectonic plates ...
While the majority of Earth's surface is covered by oceans, those oceans make up just a small fraction of the mass of the planet. The mass of Earth's oceans is estimated to be 1.37 × 10 21 kg, which is 0.023% of the total mass of Earth, 6.0 × 10 24 kg.
Dive into Earth Day's rich history and global influence. Uncover its origins and ongoing relevance in shaping environmental consciousness. Everything to know about the history of Earth Day
New research demonstrates that the solar system is wetter than we thought.
Earth is rounded into an ellipsoid with a circumference of about 40,000 km. It is the densest planet in the Solar System. Of the four rocky planets, it is the largest and most massive. Earth is about eight light-minutes away from the Sun and orbits it, taking a year (about 365.25 days) to complete one revolution.