“Sol 87”, directed by Justin Kruse (Empty Can Films, 11 min), presents James MacDonald as a solo astronaut exploring Mars, especially caves, with the help of a robot REX,
The Rex finds something, enclosed in a box, that may well be alive, looking like a squishy monster with tentacles. Someone else had placed it there. But how has it survived in a cave in a lantern?
Wikipedia embed: NASA picture of impact crater, click for attribution