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Comentario sobre "Una crisis ambiental global hace 42.000 años"

Andrea Picin¹, Stefano Benazzi^1,2, Ruth Blasco^3,4

¹Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, 04103 Leipzig, Germany.

Science (New York, N.Y.)

|November 18, 2021

Resumen

La inversión geomagnética de Laschamps hace unos 42.000 años puede haber causado cambios climáticos y extinciones. Sin embargo, la evidencia actual de la arqueología y la genética aún no prueba esta hipótesis.

Área de la Ciencia:

La geofísica
Paleoclimatología
Arqueología

Sus antecedentes:

La excursión geomagnética de Laschamps, que ocurrió hace aproximadamente 42.000 años, es un evento significativo en el registro paleomagnético de la Tierra.
Investigaciones anteriores han explorado correlaciones potenciales entre eventos geomagnéticos y cambios ambientales globales.

Objetivo del estudio:

Para evaluar la hipótesis de que la inversión geomagnética de Laschamps desencadenó cambios climáticos generalizados.
Evaluar el vínculo propuesto entre este evento geomagnético y cambios significativos en el comportamiento, extinciones en poblaciones humanas prehistóricas y megafauna.

Principales métodos:

Revisión y análisis de los datos arqueológicos existentes.
Examen de las pruebas paleoantropológicas.
Evaluación de los registros genéticos relacionados con las poblaciones prehistóricas.

Principales resultados:

El estudio examina críticamente la proposición que vincula la inversión geomagnética de Laschamps con los cambios climáticos globales.
La evidencia de los registros arqueológicos, paleoantropológicos y genéticos se evalúa para apoyar la relación causal propuesta.
El consenso científico actual sugiere que la hipótesis sigue sin probarse.

Conclusiones:

El vínculo causal propuesto entre la inversión geomagnética de Laschamps y los principales cambios climáticos, los cambios de comportamiento humano y las extinciones no está sustentado por la evidencia actual.
Se requiere más investigación que integre múltiples disciplinas científicas para validar o refutar esta hipótesis.
El estudio destaca la necesidad de pruebas sólidas para apoyar afirmaciones extraordinarias en paleoclimatología y paleoantropología.

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