ᴏғғɪᴄɪᴀʟ ɴᴀsᴀ ᴀʀᴄʜɪᴠᴇs sʜᴏᴡs ᴛʀᴇᴇs ᴏɴ ᴍᴀʀs | ɪᴛ’s ᴅᴇғɪɴɪᴛɪᴠᴇ ᴘʀᴏᴏғ ᴏғ ʟɪғᴇ