It'll be a cold day in you-know-where before you can grasp the science of "absolute zero"? Grab your Gore-Tex coat and crank up these two "Nova" programs! In "The Conquest of Cold," you'll return to the 1600s, when ingenious experiments concerning hot and cold helped usher in the Industrial Revolution. Next, "The Race for Absolute Zero" chronicles rivalries between scientists seeking to achieve the coldest temperatures known to man. 112 min. total. Soundtracks: English, DVS.