Powerful supernovas led to at least 2 mass extinctions https://earthsky.org/space/sup....ernovas-caused-at-le
Discover the world at Altruu, The Discovery Engine
Discover the world at Altruu, The Discovery Engine
Powerful supernovas led to at least 2 mass extinctions https://earthsky.org/space/sup....ernovas-caused-at-le