What is the first Earth age?
GeneralClass 12AllAnswered 27 Mar 2026
Answer
Earth's age is approximately 4.54 billion years, formed from the solar nebula. Earth's history is divided into eons: 1) Hadean Eon (4.6-4.0 billion years ago, earliest age, molten surface), 2) Archean Eon (4.0-2.5 billion years ago, first life emerged), 3) Proterozoic Eon (2.5 billion-541 million years ago, oxygen atmosphere developed), and 4) Phanerozoic Eon (541 million years ago-present, complex life flourished). The "first Earth age" would be the Hadean Eon, characterized by intense heat and meteor bombardment.
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