The coldest thing on Earth is a matter of interpretation, as there are different ways to define "coldest." Here are some of the coldest things on Earth:

• Absolute zero: Absolute zero is the theoretical limit to how cold any object could ever reach, measured in Kelvins. It is the point when all motion of atoms that make up an object stop moving, which is 0 Kelvin or -459.67 Fahrenheit.

• Clouds of gases in physics labs: The coldest materials in the world are not in Antarctica or at the top of Mount Everest, but in physics labs. Clouds of gases held just fractions of a degree above absolute zero, which is 395 million times colder than your refrigerator, a hundred million times colder than liquid nitrogen, and four million times colder than outer space temperatures.

• Copper cube in a cryostat: A chunk of copper became the coldest cubic meter on Earth when researchers chilled it to 6 millikelvins, or six-thousandths of a degree above absolute zero. This is the closest a substance of this mass and volume has ever come to absolute zero.

• Ice in Antarctica: The ice of Antarctica is the most natural coldest thing on Earth. According to satellite records, the ice of Antarctica is the coldest natural thing on Earth.

Its worth noting that the coldest place in the universe is the Boomerang Nebula, which measures at 1 degree Kelvin.