Science

Earth's mantle was 'breathing' oxygen a billion years before it hit the atmosphere, mineral time capsules reveal

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Based on a feed excerpt; full article content has not been acquired. Source evidence retrieved 14/10/2026, 19:25:24 UTC.

Briefings

A 2026 study suggests Earth's mantle may have released oxygen a billion years prior to atmospheric entry, potentially seeding life. The research indicates mineral time capsules in the mantle could have released oxygen, though this remains a hypothesis without direct confirmation. Key findings include the timing of oxygen release relative to atmospheric formation and the geological context of mantle processes, but the evidence is preliminary and lacks definitive proof of biological origin.

Key points

• A 2026 study proposes that Earth's mantle released oxygen a billion years before atmospheric entry, potentially seeding life.
• The research identifies mineral time capsules in the mantle as possible sources of oxygen, though this remains a hypothesis without direct confirmation.

Context

Earth's origin and the emergence of life remain among the oldest questions in human history. This study offers a potential mechanism for oxygen release from the mantle, though the evidence is preliminary and lacks definitive proof of biological origin.

Limitations

The evidence is from a 2026 study and remains a hypothesis without direct confirmation. The research does not provide definitive proof of biological origin, and the specific geological context of the mantle processes is not fully detailed.

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