Of course our "'human kind' era" has been temperate. If it hadn't, there wouldn't have been any such thing. If it hadn't been temperate then we wouldn't have developed agriculture.
(Which we actually did (at least) twice. There's evidence that we invented agriculture before the last proper ice age, then went back to sleep (not literally, obviously) when the ice came, then invented it again 2000 years later.)
A very small window to develop all this stuff we developed, really. We are inquisitive little monkeys.
I agree with what I think is implied in some of your posts - we don't really appreciate how precarious civilisation is. It would not really take a lot to send us right back to the stone age (having said that, we were far more technologically advanced during the stone age than people tend to think (I don't mean any 'the pyramids were really microwave generators' bullshit by that, I just mean that we weren't stereotypical cavemen during a lot of the neolithic - we had agriculture, trade (and possibly quite complex and intriguing invoicing/receipt/contract systems*), religion, lived in quite large towns/cities, were able to preserve food with salt, had diverse secondary products etc.))
Um, forgot what the point was. Water is sometimes drastically cooler than the air because it has a really fucking high specific heat capacity, that's no mystery is it?
Also we're putting a rather impressive robot on Mars in a few hours**, by hoisting it onto Mars' surface from a hovering rocket-platform 20m above the surface. That's pretty fucking amazing.
* The person sending the delivery out would (assuming the theory is correct, like) embed markers into the flat of a clay hemisphere indicating the products being transported (types and amounts) and what was owed in return, he would then imprint his identifying seal. Another hemisphere would be attached and the whole thing would then be sealed and would accompany the delivery and the receiver would break it open, being able to ensure that the person performing the delivery had not stolen anything and would know what goods were owed in return.
** Assuming the whole ridiculous plan works
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