George grabs an "apple" from the fridge and doesn't realize that it's an onion until he takes a bite out of it. He continues to eat the onion despite knowing it is not the fruit he originally wanted.

Temple, an autistic student, watches a short film on optical illusions and is immediately intrigued by it. She sets out to achieve the effects in the movie and does so after much persistence.

When you are driving or walking on the streets, it is very important that you pay attention to the signs. These keep you safe!

Beakman explains how the brain uses perception to gather visual and auditory cues and puts together what likely happened. This is used in filmmaking to make things look like they are really happening. Beakman explains how stunts are done by tricking the viewer's perception of what happened.

How does the eye work exactly? In the latest video from Decoder, learn some of the extraordinary science behind how your eyes and brain work together to perceive the world around you.