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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 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.
Earth formed about 4.54 billion years ago by accretion from the solar nebula, a disk-shaped mass of dust and gas left over from the formation of the Sun, which also created the rest of the Solar System. Initially, Earth was molten due to extreme volcanism and frequent collisions with other bodies.
Planet formation is one of the oldest concerns of human inquiry.
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.
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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 ...
Early Earth is loosely defined as encompassing Earth in its first one billion years, or gigayear (Ga, 10 9 y), [1] from its initial formation in the young Solar System at about 4.55 Ga to some time in the Archean eon in approximately 3.5 Ga. [2] On the geologic time scale, this comprises all of the Hadean eon, starting with the formation of the ...