Earth may have lost the Sun’s protective shield millions of years ago

NASA-funded studies suggest Earth’s climate has been influenced by both the Sun’s travels through dense regions of the Milky Way and the violent superflares of its youth. Those events may help explain ancient ice ages as well as how early Earth stayed warm enough for liquid water when the Sun was much dimmer. The Sun does far more than provide Earth with light and heat [1].

Sources

1. sciencedaily.com · Earth may have lost the Sun’s protective shield millions of years ago Sep 2, 2026

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