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 Home Reef Adds On Weather Blog Home Reef Adds On February 17, 2026 Surveying Popes Creek Weather Blog Surveying Popes Creek February 16, 2026 Stonebreen’s Beating Heart Weather Blog Stonebreen’s Beating Heart February 13, 2026