[The Conversation Africa] Lake Iro in Chad was in the news in early August 2025 after a picture taken by a NASA astronaut was published showing it looking like a large, circular silver mirror as sunlight reflected off its surface and into space. The phenomenon is known as a sunglint and can happen to any water surface under the right conditions. The startling picture led The Conversation Africa to find out more about the lake. Pierre Rochette is an emeritus professor in geophysics from Aix-Marseille University in France. He has Read more