Saturn has a hexagon on it. A really big hexagon. That’s pretty amazing for a planet that is mostly gas, a planet light enough that if it could be brought to earth, it would float in water. So whatever it is it’s, like, hexagonal clouds, not something sticking out of a hard surface since there probably is no hard surface on Saturn.
What is this hexagon thing? It’s at the planet’s north pole, and did I mention that it’s really big? Clouds both inside and out seem to move around it without disturbing the hexagon. In fact, the hexagon pretty much doesn’t move in relation to the clouds. It rotates with the planet.
As an engineer and science nut I just hate when a reasonable explanation for some new observation isn’t available. Atmospheric hexagons certainly haven’t been observed on Earth or elsewhere, just at Saturn’s north pole. It is, so far, a one of a kind phenomenon that has scientists a bit puzzled, looking for some rationale to explain it. Maybe Arthur C. Clarke was onto something when he wrote 2001, he just had the wrong planet.
In the meantime, a European satellite orbiting Venus is currently observing Earth, looking for signs of life. So far it hasn’t detected any.