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welcome to the cotkey ride home for t for Tuesday, February 22nd, 2022.

I'm Jackson Bird.

Today, the mysteries of people with super color vision, plus a hot Jupiter that rains gems,

and Hank the Tank, the furry 500-pound dumpster diving home invader taking California by storm.

Here are some of the cool things from the news today.

We all know about colorblindness. Maybe you yourself are colorblind. After all, about 300 million people globally exhibit colorblindness, which is close to the population of the entire U.S. But what about the opposite of color blindness? What about people who see extra colors? Jackie Higgins recently dug into this in an excerpt published today in the Wall Street Journal from her new book,

Sentient, How Animals Illuminate the Wonder of Our Human Senses. Quoting Higgins,

human beings are trichromats, that is, the cones in our eyes are sensitive to three frequencies

of light, long-w wavelength reds, medium-w wavelength greens, and short-w wavelength

blues. As this trio reacts in differing intensities and combinations, our brain compares their

outputs to create the perception of color. If red and green cones are activated, we perceive

yellows and oranges, whereas differing combinations of green with blue cones can make teals and turquoises, and blue with red cones might make violets and indigos.

The most common form of colorblindness in humans results from an absence of red or green cones, but there is another form in which all three cones are present,

only tuned to somewhat unusual frequencies of lights, end quote.

For people with three fully functioning cones, we can distinguish about a million different

colors, but tetachromats, people with an extra cone, can see about a hundred million. The work into discovering the

existence of tetrachromacy began in 1948 with Dutch physicist Hessel DeVries, who was fascinated by

...