Nuclear weapon

A nuclear weapon is an explosive device that works by altering the structure of atomic nuclei. This releases far more energy than the chemical changes that power conventional explosives. Primitive atomic weapons split uranium or plutonium atoms; more sophisticated ones fuse isotopes of hydrogen into helium. Nuclear weapon yield is measured in thousands or millions of tonnes of TNT (equivalent), typically producing an intense burst of radiation and lingering contamination ('fallout') as well as thermal and blast effects. Earth's first nuclear weapons were produced by the United States in 1945.

In 2009, UNIT attempted to fire nuclear weapons at the Sontaran flagship to prevent the Sontaran invasion of Earth, but this was thwarted by a clone of Martha Jones. (DW: The Poison Sky)

On Skaro, nuclear weapons were used early on in the Thousand Year War. (DW: Genesis of the Daleks)

Nuclear weapons were also used in the war between the Argolins and the Foamasi. (DW: The Leisure Hive)

On Alrakis, Tonska rebels used a nuclear bomb to destroy Zaniah's laboratories, inadvertently allowing a Cerunnos to escape to Earth. (VD: ...And Eternity in an Hour)

On Mars, a nuclear device was used by Adelaide Brooke to destroy Bowie Base One after an infection known as The Flood broke loose. (DW: The Waters of Mars