What Can Early Earth Teach Us About the Search for Life?
It took a long time for atmospheric evidence of life to accumulate in Earth's atmosphere. We need to heed that fact in the search for life.
Source: universetoday.com
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Geologic time | Periods, Time Scale, & Facts
Geologic time, the extensive interval of time occupied by the geologic history of Earth. Formal geologic time begins with the Archean Eon (4.0 billion to 2.5 billion years ago) and continues to the present day. Modern geologic time scales also include the Hadean Eon (4.6 billion to 4.0 billion years ago).
Source: britannica.com
Life on Earth might have gotten a boost from the Sun's mega-tantrums
High-energy particles efficiently convert atmospheric chemicals to amino acids.
Source: arstechnica.com
How Old Is Earth?
According to various religious traditions, Earth’s age ranges from about 6,000 to more than 150 trillion years, but, according to modern scientists, Earth is roughly 4.5 to 4.6 billion years old.
Source: britannica.com
Ancient zircons may record the dawn of plate tectonics
A change in gemstone composition starting about 3.8 billion years ago may offer the earliest record of one tectonic plate sliding over another.
Source: sciencenews.org