quote · Legacy record
Two-parent sex appeared on the scene about 500 000 000 years ago.
Two-parent sex appeared on the scene about 500 000 000 years ago.
Historical period not yet established
Meaning not yet available
An individual explanation has not yet been added. We do not substitute a generic description for an interpretation of these particular words.
Begin with source-checked readings and explanations ↗Attribution & collection notes
- Author or tradition
- Mark Jerome Walters
Attribution: attributed - Country attributed
- Not established
A country attribution does not establish the earliest origin. - Historical period
- Historical period not yet established
No sufficiently supported historical placement has been established. Import and download dates are not treated as composition dates. - Recorded source
- Contributor-provided quotation collection
Supplied reference C; CSV row 418020; supplied attribution, independently unverified
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