There is no one constant coldest thing on Earth, but a copper cube nearly reached coldest temperature possible. Using advanced technology, scientists managed to cool this copper cube to the lowest temperature ever record... More »

Temperatures can reach lows of -90 degrees Celsius in the mesosphere, making it the coldest layer of the earth's atmosphere. The mesosphere extends above the stratosphere and ranges from 50 km to 87 km above the surface. More »

The coldest place on Earth is Antarctica, the continent that spreads across the southern end of the planet. The lowest temperature recorded there was -135.8 degrees Fahrenheit. The mean temperature in winter at McMurdo S... More » Science Weather & Tides

As of April 26, 2013, a French research team has estimated the temperature of the Earth’s inner core at 10,800 degrees Fahrenheit. This is 1,800 degrees hotter than previous estimates. The newly hypothesized temperature ... More » Science Earth Science Layers of the Earth

Stonehenge, built between 3000 B.C. and 2000 B.C. in Wiltshire, England, is often considered the most mysterious thing on planet Earth. Both the structure's purpose and the method used to build it have puzzled people for... More » World View Social Sciences

Ice cubes melt as the molecules of air, water or other substances around the ice transfer heat into the molecules of the ice itself. As the temperature increases, the bonds change inside the ice, entering a liquid phase ... More »

The fastest way to melt an ice cube is to transfer heat energy to the ice as quickly as possible. Heat sources such as hot water, fire and an oven quickly melt ice, as does setting ice out in the sun. More »