Mark Changizi

Mark Changizi

Mark Changizi

Mark Changizi is Director of Human Cognition at 2AI, and the author of The Vision Revolution (Benbella 2009) and Harnessed: How Language and Music Mimicked Nature and Transformed Ape to Man (Benbella 2011). He has expertise in theoretical neurobiolo…
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“What Are We, In The Eyes Of Alien Probers?”

“What Are We, In The Eyes Of Alien Probers?”

When aliens come to Earth to investigate life here, they don’t simply beam up a specimen and start probing. (And they’re also, by the way, not disproportionately interested in the anus.) Only a novice prober would do a simple beam-and-probe, and would surely get a quick rap on a proboscis from the instructor. The problem with abducting an animal of interest, all by itself, is that you can’t understand an animal without an appreciation of the environment the animal inhabits.

Music Sounds Like Moving People

Music Sounds Like Moving People

Joggers love their head phones. If you ask them why, they’ll tell you it keeps them motivated. The right song can transform what is by all rights an arduous half hour of ascetic masochism into an exhilarating whirlwind (or, in my case, into what feels like only 25 minutes of ascetic masochism).Music-driven joggers may be experiencing a pleasurable diversion, but to the joggers and bikers in their vicinity, they’re Tasmanian Devils.

In Science, Indifference Is Your Friend

In Science, Indifference Is Your Friend

“Respected expert and director of the institute…”These are the words you hear as you are being introduced at a black-tie speaking engagement. You are an inventor, scientist, or artist, and this flattering introduction is music to your ears; had you seen these words written in the paper you would have saved a copy to show Mom.Finally, you are at the place every creative mind wishes to reach. The words wash back over you. “Respected”: The members of your community appreciate you. “Expert”: Your more than twenty years of dedication to the field have not gone unnoticed. “Director”: You have powerful tools and competent personnel to support your efforts. And “Institute”: Your work has attracted the funding of government, benefactors or investors.

The Science Of Illusions In Four Easy Steps

The Science Of Illusions In Four Easy Steps

Many illusions are like spherically curved space. Below on the left (fig. 1 ) is a geometrical illusion, and on the right is a ball with some great arcs drawn on it.Notice the similarities: the distortions in the illusion are qualitatively similar to the non-Euclidean nature of the contours on the ball.Why? Is there something in perception that’s like curved space?figure 1

The Power Of The Brain Through The Window Of Savants

The Power Of The Brain Through The Window Of Savants

Daniel Tammet is an autistic savant and author of the recent book Embracing the Wide Sky: A Tour Across the Horizons of the Mind (Free Press). You may have heard of him. For example, most people first became aware of the existence of Iceland upon hearing that Tammet learned Icelandic in a week. This is also the fellow that rattled off the first 22,514 digits of pi in five hours, enough for even the most exacting civil engineer, and far more accurate than the 19th century Texas town that passed an ordinance that pi would be approximated as 4. If ever there were a real human with superpowers, then Tammet fits the bill. Although stricken with adversity, his brain nevertheless is in certain respects blessed with something extra, smarter, almost magical.

A Plea For More Sex And Violence On TV

A Plea For More Sex And Violence On TV

Dear TV and Movie Producer Person,I realize that you receive letters all the time complaining about the gratuitous sex and violence on television and in movies. This is not one of those letters. In a sense, I want more sex and violence. Let me explain.It is worth reminding ourselves why we watch TV and movies. First and foremost, we watch to be entertained. And, secondly, we watch because we get to watch. That is, we watch TV and movies because the visual modality of the experience brings an evocativeness of its own, one that we seem to like. Sure, we like the dialog and the plot twists, but we could have dialog and plot twists via reading or listening to books. We watch TV and movies because, in addition, we get that visual evocativeness.

The Jacuzzification Of Evolution

The Jacuzzification Of Evolution

“Come on into the hot tub,” I told my three year old boy. But he wouldn’t budge. No way was he joining his older sister in there. “It’s warm, and it feels nice!” I urged, “There’s nothing to be afraid of.” But it was only when I turned off the jets that I could eventually coax him in.

Why Doesn’t Size Matter…for The Brain?

Why Doesn’t Size Matter…for The Brain?

No one draws pictures of heads with little gears or hydraulics inside any more. The modern conceptualization of the brain is firmly computational. The brain may be wet, squooshy, and easy to serve with an ice cream scooper, but it is nevertheless a computer. However, there is a rather blaring difficulty with this view, and it is encapsulated in the following question: If our brains are computers, why doesn’t size matter? In the real world of computers, bigger tends to mean smarter. But this is not the case for animals: bigger brains are not generally smarter. Most of the brain size differences across mammals seem to make no behavioral difference at all to the animal.

The Brain And The Vision Revolution In Iran

The Brain And The Vision Revolution In Iran

Recently I was interviewed by Pouria Nazemi, Science Editor of the Jam-e-Jam Daily Newspaper.  Jam-e-Jam is the principal Iranian newspaper and is controlled by the government.  In the wake of Iran shutting down its leading business newspaper last week and three pro-reform newspapers in October I thought this would be interesting to readers, since it appeared between these two events.

Alien Vision Revolution (Halloween Edition)

Alien Vision Revolution (Halloween Edition)

Later this evening I’ll be giving a talk to a group of astronomers on what its like to see like an alien. The beauty of this is that I can speculate until the cows come home without fear of any counterexamples being brought to my attention. And even if an alien were to be among the audience members and were to loudly object that he sees differently than I claim, I can always just say that the jury is out until we get more data, and then advise him not to let the door slam into his proboscis on the way out. Although it may seem wild-eyed to discuss the eyes of aliens, if we understand why our vision is as it is, then we may be able to intelligently guess whether aliens will have vision like ours. 

“Is Evolution Fast Enough?” How I Responded

“Is Evolution Fast Enough?” How I Responded

I receive a lot of inquisitive emails from intelligent laymen, and today I received a nice one that asked, in so many words, “Is natural selection fast enough to explain the complex biology we find in our world?”My knee-jerk response was to say, “Well, of course natural selection is fast enough, because here we are?” But I didn’t do that. I also didn’t respond by taking out my Dawkins-certified religion-bludgeoning stick. I’m not partial to that pedagogical approach, and I figure it only got Dawkins uncomfortably familiar with Ms. Garrison of South Park. Instead, I responded in what I think was a more helpful fashion, and my answer was not what the questioner expected. Here is what I wrote:*****

On The Belly: Evolution’s Hot Button

On The Belly: Evolution’s Hot Button

I need most of my body parts. I figure I have my various meaty chunks for good evolutionary reasons, and far be it from me to sell any, no matter how often that creepy guy shows up at my door with a cooler of dry ice offering me money. But if I ever were going to unload one of my body parts, I’d pick the most useless one of all, one that is even more useless than the appendix (although even it has recently been suggested to not be so useless, see Your appendix and your eyes).