Just how cold can it get? The answer may be more important than you think: scientists study absolute zero to figure out all the wacky stuff that happens to molecules when the chilly temperatures slow them way down. But up until recently, absolute zero has had a shadow of controversy surrounding it, one that two researchers decided to take head-on. Grab your scarves and coat for this one.
What the Coldest Temperatures in the Universe Can Tell Us
Do Electrons Move At Absolute Zero?