There are hundreds of these structures. They extend over much of the Middle East: Syria, Jordan, Saudi Arabia, and Yemen.
Plants make food for everyone else, but they couldn’t do it without a lot of help from their microbial friends.
If engineers could make something like a seed, it would be absolutely phenomenal. Then, imagine getting the object to last for thousands of years and still work.
Today is the United Nations Education, Scientific and Cultural Organization’s World Science Day for Peace and Development.