How cold is the coldest place in the Universe, that we know of? What's the lowest man-made temperature ever achieved? And just how many zeroes are needed to express 'absolute hot', after which the fundamentals of conventional physics start to break.
Renewable Energy. Deciding to go environmentally friendly by changing over to solar panel technology is without a doubt a positive one. Solar power is now becoming regarded as a solution to the planets power demands. Solar energy.