Mystery AtlasFrancis Crick
British Nobel laureate co-discoverer of DNA's structure who, with Leslie Orgel in 1973, proposed directed panspermia: that life on Earth was deliberately seeded by an advanced extraterrestrial civilisation, a serious scientific hypothesis he later said he no longer considered likely given advances in understanding Earth's own early chemistry.
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Theories & Explanations
Francis Crick authored Directed Panspermia Hypothesis — Proposed with Leslie Orgel in a 1973 paper; Crick later said he no longer considered it likely given advances in understanding Earth's own early chemistry.
People
Francis Crick is associated with Svante Arrhenius — Separated by seven decades, the two proposed panspermia's most influential natural and directed variants respectively.