Early Earth Wasn’t That Bad. Zircon Crystals Paint Different Picture

September 16, 2014 1:51 PM

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Early Earth Wasn’t That Bad. Zircon Crystals Paint Different Picture

Until the 1980s, geologists agreed that early Earth (known as the Hadean period) was not conducive to life. Geologists couldn’t find any rock formations dating back to the period and concluded early Earth was either completely molten or suffered from continuous asteroid bombardment. Earth was believed to be one giant pool of magma.

That view began to change around 30 years ago when geologists spotted zircon crystals dating back more than 4 billion years old.

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