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Comentario sobre "Los primeros humanos modernos fuera de África"
Warren D Sharp1, James B Paces2
1Berkeley Geochronology Center, Berkeley, CA 94709, USA. wsharp@bgc.org.
Science (New York, N.Y.)
|October 27, 2018
Resumen
El fósil de Misliya-1, potencialmente un hombre moderno temprano, puede ser mucho más joven de lo que se pensaba anteriormente. Los datos reexaminados de las series de uranio sugieren una edad mínima de 60.000-70.000 años, no de 177.000-194.000 años.
Área de la Ciencia:
- Paleoantropología
- La evolución del hombre
- Arqueología
Sus antecedentes:
- El fósil del maxilar Misliya-1 fue interpretado anteriormente como la evidencia más antigua de humanos anatómicamente modernos (Homo sapiens) fuera de África.
- La estimación inicial de la edad de 177.000 a 194.000 años se basó en la datación por serie de uranio.
Objetivo del estudio:
- Para reevaluar la edad del fósil de Misliya-1.
- Desafiar la edad previamente reportada y sus implicaciones para la migración humana temprana.
Principales métodos:
- Reanálisis de los datos de datación existentes de la serie de uranio (serie U) del yacimiento fósil de Misliya-1.
- Evaluación crítica de las metodologías de interpretación aplicadas a los datos de la serie U.
Principales resultados:
- El nuevo análisis indica que los datos de la serie de uranio no apoyan una edad de 177.000 a 194.000 años para el fósil Misliya-1.
- Los datos son consistentes con una edad mínima de aproximadamente 60.000 a 70.000 años para el fósil.
Conclusiones:
- La edad del fósil de Misliya-1 es probablemente significativamente más joven de lo que se propuso anteriormente.
- Esta edad revisada tiene implicaciones para la línea de tiempo y las rutas de la dispersión humana anatómicamente moderna temprana fuera de África.
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