How Color Vision Works
Ask any artist to explain how color works, and they will launch into a treatise about the Three Primary Colors: red, blue, and yellow. This would be wrong, says Jason Cohen.
It’s not as simple as saying "any three colors can produce all the others" because that’s clearly not true (by experiment). And it’s not as simple as saying "any three colors will do, they just have to be equally spaced around the color wheel," because yellow is common to both the painter’s and printer’s wheel, yet the other two primaries differ completely (red and blue are primary in the painter’s wheel but secondary in the printer’s wheel.) TVs and computers are different yet again. If you stand close to a CRT (non-flat-screen), you can see that every pixel (or "dot") is really three tightly-packed colored phosphors: red, green, and blue.
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Upload your mind? Here's a reality check on the Singularity.
- Though computer engineers claim to know what human consciousness is, many neuroscientists say that we're nowhere close to understanding what it is, or its source.
- Scientists are currently trying to upload human minds to silicon chips, or re-create consciousness with algorithms, but this may be hubristic because we still know so little about what it means to be human.
- Is transhumanism a journey forward or an escape from reality?
The Harvard psychologist loves reading authors' rules for writing. Here are his own.
- Steven Pinker is many things: linguist, psychologist, optimist, Harvard professor, and author.
- When it comes to writing, he's a student and a teacher.
- Here's are his 13 rules for writing better, more simply, and more clearly.
A completely unexpected discovery beneath the ice.
- Scientists find remains of a tardigrade and crustaceans in a deep, frozen Antarctic lake.
- The creatures' origin is unknown, and further study is ongoing.
- Biology speaks up about Antarctica's history.
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