Social media users struggled to find a deer hidden in an optical illusion that blended perfectly with its lush, green ...

their proximity is an illusion. Like all the best optical illusions, it's a bit of a head-scratcher. Credit: NASA And it turns out the image represents two decades of space observation.

a computational space physicist at Massachusetts Institute of Technology. When clouds appear behind the sun in a photo, it is an optical illusion. The post appears to be related to a "Flat Earth ...

"Upon first glance, it is difficult to tell if ground is rising up, sinking down, or a mix of both," according to the European Space Agency. The optical illusion occurs because people are used to ...

Telescopes are used to observe objects in outer space. The answer is encircled for you, its in the last column of the third ...

The Gaslamp Quarter attraction will feature infinity and upside-down rooms, a vortex tunnel, gravity-defying spaces and optical illusions ...