Martian canals

Martian canals were perceived networks of linear markings on Mars that were thought to be channels filled with water and built by intelligent beings. This lead to significant speculation about advanced Martian civilizations.
 Giovanni Virginio Schiaparelli Italy 1877 Martian canals

Martian canals were perceived networks of linear markings on Mars that were thought to be channels filled with water and built by intelligent beings. This lead to significant speculation about advanced Martian civilizations.