Because it's crank science harvesting money from people who don't understand physics.
Heat is almost impossible to dissipate in space because there's negligible matter to take the heat away.
Heat is almost impossible to dissipate in space because there's negligible matter to take the heat away.
In the example of a data centre, there would be considerably more heat generation than 3 astronauts, but, I would like to understand more. 38F is cold, so heat is clearly lost not as slowly as we might think.