>>52968
I haven't looked into it either because these things are always heavily clickbaited. My sources are YouTube thumbnails I refuse to click on. But Mars apparently had liquid water and an atmosphere a gorillion years ago so it's possible there was life there befure. In the grand scheme of things, we haven't really done much digging (just surface soil probing, nothing at an archaeological or geological scale). Who knows what might be buried.
>>52967
'twas a Doom reference. They basically start digging around on Mars, find ancient ruins from which they learn teleportation but accidentally open a portal to Hell.