Massimo(@Rainmaker1973):This perfectly preserved ancient tree fossil offered scientists an unprecedented view into a moment 42,000 years ago when the Earth’s magnetic field went haywire. The ancient kauri tree in New Zealand has provided a record of the Laschamp excursion, a temporary reversal of Earth's magnetic poles. During this event, the magnetic field weakened to 28% of its strength, exposing the planet to intense cosmic radiation.

Massimo

@Rainmaker1973

Engineer. Selecting and curating pictures and videos trying to awaken your sense of wonder since 2014. Science, tech, art, weather, space, the unusual around us

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Massimo@Rainmaker1973

2026.09.15 08:16

This perfectly preserved ancient tree fossil offered scientists an unprecedented view into a moment 42,000 years ago when the Earth’s magnetic field went haywire. The ancient kauri tree in New Zealand has provided a record of the Laschamp excursion, a temporary reversal of Earth's magnetic poles. During this event, the magnetic field weakened to 28% of its strength, exposing the planet to intense cosmic radiation.