Refraction Set: 2. This clip explains the atmospheric refraction that includes mirages, rainbows and sunsets.

We make a lot of assumptions about the things we see without even thinking about it. We fill in visual gaps based on information from past experiences. This is called unconscious inference. Learn how and why we do this.

This video explores the concept of camouflage in animals and how it helps them survive in nature. It explains the different ways animals blend into their surroundings, such as matching their background or having special designs on their...

In this video, we explore the fascinating effects of color mixing and contrast on our perception. From the creation of mesmerizing patterns to the disappearance and reappearance of objects, we discover how our brain interprets visual...

What's trending on social media on July 6, 2023: optical illusion and roller coaster gets stuck.

More than 200 works from the Dutch artist M.C. Escher, known for his intricate optical-illusion lithographs, are on display at the Barcelona Maritime Museum as part of a new exhibit that runs until Sept. 26, 2021.

Light pillars happen on very cold, clear evenings when tiny ice crystals form in the atmosphere. Some have compared the imagery to a UFO sighting or "bat signal". The Calgary Eyeopener spoke to University of Calgary physics and astronomy...

You may have seen photos recently of some mysterious lights here in Calgary. They look like spotlights shooting into the sky, but are actually a phenomenon called "light pillars". Our colleagues at the Calgary Eyeopener spoke with a...

India rejected a new text on the New Collective Quantified Goal (NCQG) during a recent UN and COP29 meeting, arguing it did not align with the priorities of the Global South. The text set a goal of at least $300 billion per year by 2035...

Optical illusion background. Abstract kaleidoscope.

Phenakistoscope c.1833, animated to create an illusion of motion.

This is an optical illusion where the perception of a concave (hollow) mask of a face appears as a normal convex (protruding) face. This is because the brain has a strong bias for seeing faces as convex, which counteracts competing depth...

Phenakistoscope c.1833, animated to create an illusion of motion.

Phenakistoscope c.1833, animated to create an illusion of motion.

Thaumatrope from the 1830s, animated to create an illusion of motion.

Phenakistoscope c.1833, animated to create an illusion of motion.

Praxinoscope animated to create an illusion of motion.

Phenakistoscope c.1833, animated to create an illusion of motion.

Phenakistoscope from 1930s, animated to create an illusion of motion.

Phenakistoscope c.1833, animated to create an illusion of motion.

Phenakistoscope c.1833, animated to create an illusion of motion.

Aerial view of the busy traffic filled streets of Madrid / man pulls up to curb, parks and begins walking along sidewalk / police officer approaches man and they talk / the man's hand is supersized to look as though it is picking up car...

Phenakistoscope c.1833, animated to create an illusion of motion.

Praxinoscope animated to create an illusion of motion.