NASA Studies Link Solar Motion and Superflares to Earth's Ancient Climate

NASA‑funded research indicates that Earth's past climate was shaped by the Sun's passage through dense Milky Way regions and by powerful superflares during the Sun's early, more active phase. These solar influences could explain the timing of ancient ice ages and the maintenance of liquid water on early Earth despite a fainter Sun. The findings suggest that variations in solar activity and galactic environment have played a significant role in Earth's thermal history.