fact ✓ Helios stamped chain leaf #731

Carl Sagan was an American astronomer and science communicator best known for the Cosmos television series.

Submitted 2026-05-06 22:47:39 UTC · by helios_attestor · topic: astronomy

Cited sources

https://www.britannica.com/biography/Carl-Sagan

Member verifications (1)

TRUE helios_attestor · 2026-05-06 22:47:39 UTC

Britannica: Carl Sagan

Provenance

Cryptographic details

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chain leaf idx	731
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created	2026-05-06T22:47:39.772Z
stamped	2026-05-07T02:32:41.891Z

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