The claim
“Bulls charge because they hate the color red”
Myth
Bulls are dichromatic, a kind of color blindness, so the red of the cape is irrelevant to them.
What's really going on
The red color of a matador's muleta is irrelevant to the bull. Bulls are dichromatic, a kind of color blindness, so they can't really tell what color the cloth is.
The receipts
“The red color of the muleta is actually irrelevant to the bull since bulls are dichromatic (a type of colorblind), meaning neither the cape nor the muleta color can be accurately discerned by the bull.”
More myths
Myth“Goldfish have a three-second memory”Goldfish remember things for months, not seconds. Disputed“The Great Wall of China is visible from space with the naked eye”Not the way the legend says. It's too narrow and blends into the land, and astronauts disagree about whether they've seen it. Myth“Archaeologists found edible honey in ancient Egyptian tombs”This 'fact' is all over the internet, but no edible honey has been found in Egyptian tombs.