Scientists have discovered that there are kilometers-wide caves and tunnels on the moon which may be available for human settlement in from of cities.
During the 46th Lunar and Planetary Science Conference (LPSC) held on March 17 in Texas, Professor Jay Melosh unveiled their theoretical study. He put forward that human bases and cities may be established under the moon surface.
Lava tunnels are formed when the external layer of a lava flow cools down enough to form a hard shell, while the hotter inner part remains fluid. The lava probably drains leaving a natural tunnel behind. Such formations are abundant in some regions on Earth, and are suspected to be present on the Moon as well.