Cold refers to the condition or subjective perception of having low temperature. A cold body is often described as the opposite of hot, or as having less heat, although the latter use of "heat" would be incorrect in the context of physics, as heat refers to the transfer of energy between bodies, which do not "have" heat themselves.

A lower bound to temperature is the absolute zero, defined as 0 K on the Kelvin scale, an absolute thermodynamic temperature scale. This corresponds to −273.15 °C on the Celsius scale, −459.67 °F on the Fahrenheit scale, and 0 °R on the Rankine scale.

Since temperature relates to the thermal energy held by an object or a sample of matter, which is the kinetic energy of the random motion of the particle constituents of matter, an object will have less thermal energy when it is colder and more when it is hotter. If it were possible to cool a system to absolute zero, all motion of the particles in a sample of matter would cease and they would be at complete rest in this classical sense. The object would be described as having zero thermal energy. Microscopically in the description of quantum mechanics, however, matter still has zero-point energy even at absolute zero, because of the uncertainty principle.

Aaron Lewis, (born April 13, 1972), is the lead vocalist, rhythm guitarist, and founding member of the rock group Staind, with whom he has released seven studio albums. He has since ventured into country music with his debut solo album, Town Line. The EP was released on March 1, 2011 on Stroudavarious Records. Lewis' first full-length solo release, The Road, will be released by Blaster Records on August 14, 2012.

Lewis grew up, largely, in Longmeadow, Massachusetts, then moved to the Forest Park section of nearby Springfield from 8th grade through high school. His mother is Jewish with origins in Russia, Poland and Germany and his father is Catholic of Italian, Welsh and English origin. His hobbies include fishing, playing golf, riding his motorcycle and dirt bike, as well as hunting. He has worked in landscaping, cleaned hotel rooms, and played solo acoustic sets in bars, pool halls, restaurants and coffeehouses.

Lewis was, before Staind, in a band known as J-CAT with Tori Sands, Chris Ballini, and former Staind bandmate Jon Wysocki. An album surfaced on the internet with nine of J-CAT's performances at Club Infinity in Springfield, Massachusetts. The performances were recorded while Dysfunction was being recorded. Two of Staind's popular singles—"Outside" and "It's Been Awhile"—were both originally performed by J-CAT with somewhat different lyrics.

Michael Steven Bublé ( /ˈbuːbleɪ/; born 9 September 1975) is an Italian Canadian singer and actor. He has won several awards, including three Grammy Awards and multiple Juno Awards. His first album reached the top ten in Canada and the UK. He found a worldwide audience with his 2005 album It's Time, and his 2007 album Call Me Irresponsible which reached number one on the Canadian Albums Chart, the U.K. Albums Chart, the U.S. Billboard 200 albums chart, the Australian ARIA Albums Chart and several European charts. Bublé has sold more than 30 million albums worldwide.

Michael Bublé was born in the City of Burnaby, British Columbia, Canada to Lewis Bublé, a salmon fisherman, and Amber (née Santagà). He has two younger sisters, Crystal (an actress) and Brandee. He attended Seaforth Elementary School and Cariboo Hill Secondary School. According to an Oprah interview on 9 October 2009, Bublé dreamed of becoming a famous singer since age two. When he was a teenager, he slept with his Bible and prayed to become a singer. Bublé's interest in jazz music began around age five when his family played Bing Crosby's White Christmas album at Christmas time. The first time that his family noticed his singing talent was at Christmas time when Bublé was 13 years old, and they heard him powerfully sing the phrase "May your days be merry and bright" when the family was singing to the song "White Christmas" in a car ride.