The Spinning Dancer is a classic example of a bistable perception illusion. These illusions present two equally valid interpretations, causing our brains to flip-flop between them.

People are in a lively debate over which way it's spinning, and suggesting some seemingly unhinged ways to get her to spin the opposite way. Seriously, you don't want to do this in a public place ...

This optical illusion is made of two rotating rings with six ovals side by side. Akiyoshi Kitaoka/Twitter The rings appear to be moving at different speeds but are actually spinning at the same pace.

In the new study, which was published Feb. 20 in The Astrophysical Journal Letters, researchers suggested that the ALMA observations may have been caused not by the star's spinning but by massive ...

A screen shot of an optical illusion. (Akiyoshi Kitaoka / Twitter screen shot) This mind-boggling optical illusion may baffle you, even after you learn that you didn’t see what you thought you did.

This is an optical illusion sure to knock you off your high horse. An animated video of a moving pony is sparking fervent debate on social media, with viewers at war over the direction the animal ...

Now, a team from the Max Planck Institute for Astrophysics, led by Ph.D. student Jing-Ze Ma, may have an explanation for why Betelgeuse appears to be spinning so utterly fast.

Mind This optical illusion expands as you stare at it - and now we know why Using a computer model of the retina, researchers have been able to trace the cause of the expanding hole illusion ...

Mezmoglobe has returned to Kickstarter this month, launching its new 360 optical illusion spinning top in the form of the Mezmocoin Infinity. Capable of spinning for over 25 minutes.