Scientists have unearthed a 40-million-year-old ancient river system beneath Antarctica’s ice sheets. This discovery, made by a team of geologists led by Johann Klages, sheds light on Earth’s climate past and its potential future implications. The river system, dating back to the middle-to-late Eocene epoch, offers insights into past greenhouse gas levels and global cooling. This finding, published in Science Advances, underscores the significance of studying Antarctica’s hidden landscapes to understand climate change dynamics.