Alien fossils: Evidence of ancient life on Mars could be trapped on slopes of volcano

Scientists have pinpointed a region on Mars where ancient lifeforms may be trapped under a layer of mineral deposits. The climate on the red planet 3.5 billion years ago changed dramatically from a relatively warm, wet period to one that was arid and cold. Now a team of scientists has discovered mounds of a mineral deposited on a volcanic cone less than 3.5 billion years ago that may preserve evidence of one of the most recent habitable microenvironments on Mars. (Daily Mail)