Postage stamp souvenir sheet titled 'ALH84001 Mars Meteorite' issued by Guyana

This commemorative souvenir sheet was issued by Guyana in the mid-1990s to celebrate the discovery of the ALH84001 meteorite, a Martian rock found in Antarctica that gained worldwide attention when NASA scientists announced potential evidence of ancient microbial life on Mars. The stamp features an educational diagram showing the path of the meteorite from Mars through space to Earth, along with an image of the actual meteorite specimen. Such thematic stamps became highly popular among space enthusiasts, meteorite collectors, and philatelists who specialize in science and astronomy topics. These souvenir sheets are valued by stamp collectors worldwide for their educational content and historical significance in documenting one of the most exciting moments in space science history. The combination of space exploration themes with philately creates a unique collectible that appeals to multiple collecting communities.