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 Lake Coatepeque Weather Blog Lake Coatepeque March 9, 2026 Ailing “Megaberg” Sparks Surge of Microscopic Life Weather Blog Ailing “Megaberg” Sparks Surge of Microscopic Life March 6, 2026 A Little Town with a Long Name Weather Blog A Little Town with a Long Name March 5, 2026