Nasa's Unexplained Files

A NASA probe has photographed a recognisable formation on Mars, prompting the question of what created the so‑called “Mars Henge”. The segment also explores the circumstances that made an Apollo astronaut fall ill while on the Moon. Both mysteries are examined in the programme.

Stonehenge on Mars is a television programme presented as a single episode. It falls under the genre of an episode‑style documentary, focusing on a specific scientific curiosity rather than a series‑long narrative. The title hints at a comparison between an Earth‑bound monument and a mysterious feature discovered on another planet. The core of the episode follows a NASA probe that has returned a photograph showing a recognisable structure on the Martian surface. The image has prompted the question of what created this formation, which the programme refers to as “Mars Henge”. In addition to the Martian mystery, the episode also turns its attention to an incident involving an Apollo astronaut who fell ill while on the Moon, asking how that sickness came about. Throughout the broadcast, the presenters guide viewers through the two topics, first examining the visual evidence of the Martian structure and then outlining the known facts surrounding the astronaut’s ailment on the lunar surface. By juxtaposing the two seemingly unrelated events, the programme aims to shed light on both the possible origins of the “Mars Henge” and the circumstances that led to the astronaut’s illness, leaving the audience with a clearer understanding of the questions raised.