Spooky 'Spider on Mars' finally got revealed through the explanation
The huge sizes of 3300 feet (1 km) are not similar to anything on earth, and they are called Spider on Mars.

Spooky 'Spider on Mars'
Scientists in the United States are researching a large chunk of dry ice to find out what is behind the strange patterns of aliens known as "Mars spiders".
These patterns can be seen in satellite images of the South Pole on the Red Planet, although they are not real spiders; While the branches may be branching, the black shapes carved on the Martian surface look awful enough. Researchers discovered these shapes more than two decades ago. They call them "arrainforms" (meaning "like spiders").