Here, they will see aliens in the first place.
The earth is large. Over the last several thousand years of people trying to leave at least some trace on it. Giant pyramids, great walls, sprawling across the city and much, much more.
But with the International space station which is hurtling through space at an altitude of about 600 kilometers above the Earth’s surface, our planet is a huge looks tiny. Houses, roads, skyscrapers — everything else disappears. Only some objects are still visible even from space.
The great pyramid at Giza
Do you see a little triangular shadow in the center of this photograph? The shadows and the little spot right under them — in fact, some of the most magnificent structures ever built by man. The pyramids of Giza were built thousands of years ago. They are huge, but from space this is exactly unnoticed.
City lights
At night light pollution of our cities drowns out the light of stars. But the one who will watch from space down, I see the constellations that form the Metropolitan areas around the world.
Copper mine, Kennecott
Copper mine, Kennecott, located southwest of salt lake city, Utah, is one of the largest quarries in the world. Its length is four kilometers and reaches a depth of two. And the mine still operates — the development was started in the late 19th century.
Bridges
People definitely love to build bridges. We have progressed from building small bridges out of logs and stones, to massive, carefully designed steel and concrete structures, which annually move millions of cars. This photo was taken by Chris Hadfield, just before returning to Earth.
Palm Islands in Dubai
A set of anthropogenic Islands located off the coast of Dubai. Several years working tirelessly chose the sand from the bottom of the Persian Gulf, and then sprayed it so that it takes the desired shape.
Greenhouses in Almeria
In the province of Almeria, Southeast Spain, there is a huge number of greenhouses that can be seen even from space. They cover more than 64,000 acres of land. Millions of tons of fruits and vegetables will be exported to every country in the world.
