The "Door to Hell" or the Darvaza Gas Crater is a natural gas field located in the Karakum Desert in Turkmenistan. It has been burning continuously since 1971 when it was set on fire by Soviet geologists to prevent the spread of methane gas after a drilling rig collapsed into it.

The Fremen stilsuit, native to the desert planet Arrakis *, is a marvel of engineering. Designed to conserve moisture, this full-body attire reclaims sweat, breath, and waste, converting them into drinkable water. Its black, skin-tight material is layered to reduce heat exposure and prevent water loss. Tubing systems distribute reclaimed water to catchpockets, from which the wearer can drink. Breath filters purify and reclaim moisture, while a nose plug ensures no moisture escapes. Built for desert survival, the stilsuit ensures the Fremen can thrive in Arrakis' harsh environment, making the most of every precious drop of water.

H-microfusor is a reactor for deuterium/tritium nuclear fusion whose size does not exceed 1 cubic meter and which is able to persist in the breakeven state (Q>=1) for at least 1 second.

Geodetic dome providing a protective membrane around highly diversified biosphere above, around and  below Berlin's Tempelhofer Field.