50

Year 50 was a common year starting on Thursday (link will display the full calendar) of the Julian calendar.

Events

Roman Emperor Claudius appoints Agrippa II governor of Chalcis.
Claudius adopts Nero.
Cologne is raised to the status of a city.
In Britain, governor Publius Ostorius Scapula begins his campaign against the recalcitrant Silures of south Wales, who are led by the former Catuvellaunian prince Caratacus. London (Londinium), Exeter (Isca Dumnoniorum), Tripontium (near modern Rugby) and the fort of Manduessedum (near modern Atherstone) are founded (approximate date).
The Iazyges settle in the plains to the east of the Tisza River.
Romans learn the use of soap from the Gauls.
Rome now has a population of 1 million.

The Tocharian or Yue-Chi tribes are united under the Kushan leader Kujula Kadphises, thus creating the Kushan Empire in Afghanistan and northern India. (approximate date)

Pedanius Dioscorides describes the medical applications of plants in De Materia Medica.
Pamphilus of Alexandria writes a poetic lexicon.
Hero of Alexandria invents a steam turbine (possible date).
Diogenes, the Greek explorer, discovers the African Great Lakes.
The distinction between chronic maladies and acute illnesses is made by Thessalos.