Leonard David's INSIDE OUTER SPACE

Hundreds of hectares of winter wheat fields located on the southern edge of the Taklimakan Desert near China’s Kunyu City, Xinjiang Uygur Autonomous Region.
Image credit: China Central Television

Signaling other intelligences beyond our solar system without elaborate and expensive electronic gear may be underway – but unknowingly.

Kunyu City, Xinjiang Uygur Autonomous Region, is located in northwest China. On that site, huge pointer sprinklers are irrigating over 533 hectares of winter wheat fields located on the southern edge of the Taklimakan Desert.

Then there’s the world’s largest cluster of solar farms, a megaproject of 235 square miles of sun energy-soaking panels located in Qinghai, China, high on the isolated Tibetan Plateau.

A proposed Pythagorean theorem created on Earth would be huge enough to be viewed from the moon – even by residents of Mars.
Image credit: Wikipedia

Tell-tale signs?

To be sure, the Earth is dotted with humongous, human-made artificial structures.

To an alien eye trained on our planet, perhaps they are tell-tale signs of intelligent goings-on, maybe formations that speak volumes about we Earthlings with no need to squeak out purposeful high-tech and sophisticated signals?

For more details, go to my new Space.com story – “Making contact with ET? Aliens may already know we’re here – ‘Megaprojects’ like huge solar farms could be visible from great distances” – at:

https://www.space.com/space-exploration/search-for-life/making-contact-with-et-aliens-may-already-know-were-here