A new study suggests that early Homo sapiens may have survived and even thrived during a period when the Earth’s magnetic field was weakened, exposing them to increased solar radiation. The researchers used advanced 3D modeling and archaeological evidence to analyze how this event, known as the Laschamps excursion, may have influenced human evolution and migration.
Around 41,000 years ago, the Earth’s magnetic field temporarily weakened, allowing more cosmic radiation to reach the planet’s surface. This led to intense auroras and increased UV radiation, making it essential for humans to adapt to survive. The study found that early Homo sapiens used tailored clothing, ochre as a sunscreen, and cave sheltering to cope with this new environment.
The researchers reconstructed the global space environment during the Laschamps event using advanced modeling tools. Their simulations revealed a planet dramatically different from today, with auroras visible across Europe and northern Africa, and large areas exposed to solar radiation. This intense exposure may have pushed early humans to develop protective strategies, such as clothing and ochre use.
The study provides new insights into human prehistory and raises questions about how future magnetic reversals might affect modern life. With the Earth’s magnetic field currently weakening, experts warn that a similar event could have devastating effects on communication systems and human health.
By studying this ancient event, scientists can gain a better understanding of exoplanetary physics and the importance of a strong magnetic field in protecting life on Earth. The Laschamps excursion serves as a reminder of the crucial role our planet’s shield plays in supporting life, and how essential it is for humans to adapt when faced with environmental challenges.
Source: https://www.earth.com/news/new-theory-explains-why-neanderthals-vanished-and-homo-sapiens-are-alive-today