The McGurk effect: the same sound plus two different mouth movements produces two different sounds.

Read more about the McGurk effect. (via ★interesting-links)

• illusions
• video

Mr. Angry and Mrs. Calm is a great optical illusion...up close, she's on the right but switches to the left when you view it from far away. (via bb)

• illusions
• optics

Check out the moon illusion for yourself this week; it's the lowest-hanging full moon in 18 years.

• astronomy
• illusions
• Moon
• optics
• science