Cancer is a class of diseases characterized by out-of-control cell growth. There are over 100 different types of cancer, and each is classified by the type of cell that is initially affected.
The hottest recorded temperature ever on earth was in Libya on September 13, 1922, which was 58 Â°C. Libya, Algeria, Death Valley and Iraq have some of the hottest temperatures on earth. During the summer, they have some of the hottest weather in the world. In contrast with these hot countries, the highest recorded temperature ever in the South Pole was on December 27, 1978, which was -14 Â°C.
The greatest number of consecutive days with a maximum temperature of 100 F or above was 154 days in the summer of 2001, according to the U.S. Geological Survey (USGS). The summer of 1996 had 40 days over 120 F, and 105 days over 110 F, making it the hottest summer on record.