> The 10 hottest years on record for the entire planet have all been in the 21st century. The 10 hottest years in the last ~century that is. Also, see my post

> The 10 hottest years on record for the entire planet have all been in the 21st century. The 10 hottest years in the last ~century that is. Also, see my post on temperature extremes just below this one for some anecdata on which period in time was good for the most records (1920-1940). Going by the data that period was far warmer - and in some places also quite a bit colder - than it is now. https://news.ycombinator.com/item?id=31557076 https://news.ycombinator.com/item?id=31557076 Also have a look at the Atlantic period (6500 BC-4000 BC, also referred to as "the Holocene climatic optimum") when talking about "the hottest years on record". Notice that the sea rose up to to 3 m above the present level after which it started to go down due to water being locked into glaciers again. The end of the climatic optimum lies somewhere around 2800 BC going by temperature decline or 2300 BC to 1100 BC (depending on where you look) as evidenced by elm-decline, the latter of which being disputed as to whether it was (and is, we are again in a period of elm-decline) the result of temperature decline or human activity or a combination of these two factors.