
... and entering the domain of the underworld.

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krabcat wrote:Then i found The World Ocean. Columbia Encyclopedia. 28 May 2007 which flat out said that the average was 3.9C
keithl wrote:The questioner asked about water at the Earth's surface, not in the depths.
Rombobjörn wrote:the question was badly asked.
I think ocean water is typically considered surface water, as opposed to groundwater or water deep in the mantle. Surely you've heard something like, "3/4 of Earth's surface is covered by water," which I think is more commonly said than "3/4 of Earth's surface is water."keithl wrote:The questioner asked about water at the Earth's surface, not in the depths.
Showsni wrote:Maybe the sign was trying to be even deeper than that. Perhaps it was trying to say that, in general, water is one of the substances that is hotter than the average of the temperature of all substances in the universe.
Could that be true? Is water generally more likely to be warmed up than a random given substance?
What is the average temperature of the universe? How different is the average when measured as an average over space (say, measure the temperate in each cubic centimetre then find the average temperature of a cubic centimetre in the universe) as opposed to an average over substance (measure the temperature of each molecule in the universe then find an average temperature per molecule)?
xkcddar wrote:When I first saw this comic there was significantly more content that has subsequently been removed.
Randall references the paper "Climate change inferred from borehole temperatures" by Henry N. Pollack (available on umich.edu), and talks about it. Any idea why it was removed?
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