Oxygen Crisis? The Asteroid Bombardment That Shaped Earth | WION Podcast
A new study suggests that ancient asteroid impacts may have significantly altered Earth’s early atmosphere. Around 4 billion years ago, massive space rocks bombarded the planet, releasing vapors that chemically reacted with and depleted atmospheric oxygen. These collisions also produced glassy particles called impact spherules, now found in ancient rock layers. The research indicates the impact rate may have been 10 times higher than previously thought. This could explain why oxygen remained scarce during the early Archean eon, delaying atmospheric evolution.
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