If alien civilizations rise and fall, they may leave behind artifacts long after they are gone. From abandoned megastructures ...

If alien civilizations once existed, their relics could still be out there. Xenoarchaeology imagines how humans might study artifacts not of Earth but of other worlds. Drone footage captures flooding ...

First contact with alien civilizations won’t be with the beings themselves, but with their technology. By searching for these extraterrestrial artifacts, we embark on a journey through our solar ...