Good point, it's factual though. And we don't even need to go back millions of years : from a somewhat different cause, merely ~10kya, at the beginning of the

Good point, it's factual though. And we don't even need to go back millions of years : from a somewhat different cause, merely ~10kya, at the beginning of the current interglacial, glacier melt has caused a tsunami that scraped off the northern half of what would be today the Netherlands, and opened the English Channel. Much smaller, the Alpine village of Saint-Gervais has been razed merely a century ago by a glacial dam bursting, killing nearly all 200 inhabitants. Since then, regular holes had been drilled, hoping to evacuate water... but no water came out, because researchers realized in 2009 that the holes have been drilled too high ! 10 times more people live in Saint-Gervais today. So we better keep a close eye on big glaciers, and especially Antarctica and Greenland...