Forty Winks

What is How to Measure Sleep?

As we sleep, our brains pass through a series of stages, like shifting between gears in a car. The most famous is REM sleep, characterized by fluttering eye movements. But other categories include light sleep (stage S1), stable sleep (S2), slow-wave sleep (SS), and even being awake (W), each identified by a signature from polysomnography (PSG), in which electrodes record from the scalp, eyelids, and heart.

Very Telling

Magic and the Brain: Teller Reveals the Neuroscience of Illusion

“Tricks work only because magicians know, at an intuitive level, how we look at the world,” says Macknik, lead author of the paper. “Even when we know we’re going to be tricked, we still can’t see it, which suggests that magicians are fooling the mind at a very deep level.” By reverse-engineering these deceptions, Macknik hopes to illuminate the mental loopholes that make us see a woman get sawed in half or a rabbit appear out of thin air even when we know such stuff is impossible. “Magicians were taking advantage of these cognitive illusions long before any scientist identified them,” Martinez-Conde says.

There are some quotes from Teller, though these are obviously illusions, because Teller is the one who doesn’t talk.

Before long, they were performing Cups and Balls on Letterman. The trick became a centerpiece of their first off-Broadway show. “It was so liberating to be able to treat the audience like intelligent adults,” Teller says. Instead of engaging in the “usual hocus-pocus clichés,” the clear cups forced the crowd to confront the real source of the illusion: the hard-wired limitations of their own brains. Because people were literally incapable of perceiving the sleight of hand—Teller’s fingers just moved too fast—it didn’t matter that the glasses were transparent.

Chirality is not Dead

Scientists give a hand(edness) to the search for alien life

“If the surface had just a collection of random chiral molecules, half would go left, half right,” Germer says. “But life’s self-assembly means they all would go one way. It’s hard to imagine a planet’s surface exhibiting handedness without the presence of self assembly, which is an essential component of life.”

Because chiral molecules reflect light in a way that indicates their handedness, the research team built a device to shine light on plant leaves and bacteria, and then detect the polarized reflections from the organisms’ chlorophyll from a short distance away. The device detected chirality from both sources.

I Don't Know the Answer, but Neither Do You

Unqualified Offerings: A lot of ignorance needn’t stop you from offering contradictory theories

I have no particular opinion on why there is a gender gap in certain fields of science. I have a lot of skepticism for various theories offered, but I have no theory of my own. And it isn’t just because it’s a hot potato issue where it would be easy to put a foot in my mouth. I really, honestly, find many explanations wanting.

The thing that gets me about this whole discussion is the unscientific nature of a lot of the analysis, or lack thereof (there’s an “if you disagree you must be a misogynist!” crowd that sometimes shows up in places and shouts down any hope of actual discussion), because bad arguments make me cringe, and these are bad arguments. Most of the explanations that are proffered have stark counterexamples, either within STEM areas or in the business world, that show the explanation to be either wrong or incomplete. One thing not mentioned in the link is the disregard for the basic math conundrum of the Garrison Keillor effect— if you have overrepresentation in some areas, it’s simply impossible to simultaneously have equity in all the rest.