Giant ice bulldozers: How ancient glaciers helped life evolve

New research has revealed how massive ancient glaciers acted like giant bulldozers, reshaping Earth's surface and paving the way for complex life to flourish. By chemically analyzing crystals in ancient rocks, the researchers discovered that as glaciers carved through the landscape, they scraped deep into the Earth's crust, releasing key minerals that altered ocean chemistry. This process had a profound impact on our planet's composition, creating conditions that allowed complex life to evolve.