Case file · Non-fiction & research literature
The Ummo letters
More than 1,300 pages of typed letters sent from 1966 to Spanish contactees, claiming to come from beings from the planet Ummo.
1966 CE · 40.42, -3.70 · status: hoax
The account
For: some readers, including French physicist Jean-Pierre Petit, claimed to find sophisticated science in the letters.
The sceptical view
Against: José Luis Jordán Peña claimed responsibility for the hoax; Vallée compared its science to dated science fiction.