We thought this was a hoax, but there’s some actual science behind it.  A video that appears to show a huge city floating in the clouds in China is going viral.  And it really DOES look like a bunch of skyscrapers, it’s not just some weird-shaped cloud.

Apparently it only lasted a few minutes, but hundreds of people saw it.  Then people online started tossing out crazy theories . . . like it was a government conspiracy, and a portal to another dimension opened up.

But it’s actually an optical illusion called a fata morgana mirage, where warm air in the atmosphere rests on cooler air, and acts like a lens that reflects something in the distance.  And it usually distorts what it’s reflecting so much, you can’t tell what it