Weather Blog Blast From the Past: A Modern Lake in an Ancient Crater Famously visible from space, ring-shaped Manicouagan Lake was filled at the dawn of the Space Age when Canada dammed a river to flood a Triassic-aged impact crater. Read More… About Author OTW Observer See author's posts Post navigation Previous ’I’m a doctor – there’s 2 reasons why heatwaves feel more uncomfortable in the UK’Next London weather expert warns of further incoming heatwaves new as map shows 31C return Related Stories Webb Data Reveals Dark Matter Weather Blog Webb Data Reveals Dark Matter January 27, 2026 Floods Inundate Southern Mozambique Weather Blog Floods Inundate Southern Mozambique January 27, 2026 Finding Freshwater in Great Salt Lake Weather Blog Finding Freshwater in Great Salt Lake January 26, 2026