Eavesdropping on outer space- search ????other civilizations have been going on for 50 years, but the results are scantyEavesdropping on outer space- search ????other civilizations have been going on for 50 years, but the results are scanty
A city on top of the mountains of a once great civilizationA city on top of the mountains of a once great civilization
An ancient tree against the background of mountains and cloudsAn ancient tree against the background of mountains and clouds
The driver admires the night sky far from civilizationThe driver admires the night sky far from civilization