Earth's climate was significantly influenced by the Sun's passage through a dense interstellar cloud millions of years ago.

New research published in Nature Astronomy suggests Earth's climate was significantly influenced by the Sun's passage through a dense interstellar cloud millions of years ago. The study reveals insights into how our solar system's movement through the Milky Way affects Earth's climatic history. The Sun's oscillation around the center of the Milky Way could have led it through dense interstellar regions, interfering with the solar wind and potentially cooling the Earth.