Videos by topic: LIFE

Popper Versus Bacon

[5.7.15]

People have to go around measuring things. There's no escape from that for most of that type of work. There's a deep relationship between the two. No one's going to come up with a model that works without going and comparing with experiment. But it is the intelligent use of experimental measurements that we're after there because that goes to this concept of Bayesian methods. I will perform the right number of experiments to make measurements of, say, the time series evolution of a given set of proteins. From those data, when things are varying in time, I can map that on to my deterministic Popperian model and infer what's the most likely value of all the parameters that would be Popperian ones that would fit into the model. It's an intelligent interaction between them that's necessary in many complicated situations. 

PETER COVENEY holds a chair in Physical Chemistry, and is director of the Centre for Computational Science at University College London and co-author, with Roger Highfield, of The Arrow of Time and Frontiers of Complexity. Peter Coveney's Edge Bio Page.


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This Is My Vision Of "Life"

[4.30.15]

My vision of life is that everything extends from replicators, which are in practice DNA molecules on this planet. The replicators reach out into the world to influence their own probability of being passed on. Mostly they don't reach further than the individual body in which they sit, but that's a matter of practice, not a matter of principle. The individual organism can be defined as that set of phenotypic products which have a single route of exit of the genes into the future. That's not true of the cuckoo/reed warbler case, but it is true of ordinary animal bodies. So the organism, the individual organism, is a deeply salient unit. It's a unit of selection in the sense that I call "a vehicle".  

There are two kinds of unit of selection. The difference is a semantic one. They're both units of selection, but one is the replicator, and what it does is get itself copied. So more and more copies of itself go into the world. The other kind of unit is the vehicle. It doesn't get itself copied. What it does is work to copy the replicators which have come down to it through the generations, and which it's going to pass on to future generations. So we have this individual replicator dichotomy. They're both units of selection, but in different senses. It's important to understand that they are different senses.   

RICHARD DAWKINS is an evolutionary biologist; Emeritus Charles Simonyi Professor of the Public Understanding of Science, Oxford; Author, The Selfish Gene; The Extended Phenotype; Climbing Mount Improbable; The God Delusion; An Appetite For Wonder; and (forthcoming) A Brief Candle In The Dark. Richard Dawkins's Edge Bio Page


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Michael McCullough: "Two Cheers For Falsification"

HeadCon '14
[11.18.14]

What I want to do today is raise one cheer for falsification, maybe two cheers for falsification. Maybe it’s not philosophical falsificationism I’m calling for, but maybe something more like methodological falsificationism. It has an important role to play in theory development that maybe we have turned our backs on in some areas of this racket we’re in, particularly the part of it that I do—Ev Psych—more than we should have.

MICHAEL MCCULLOUGH is Director, Evolution and Human Behavior Laboratory, Professor of Psychology, Cooper Fellow, University of Miami; Author, Beyond Revenge. Michael McCullough's Edge Bio page


 

Lawrence Ian Reed: "The Face Of Emotion"

HeadCon '14
[11.18.14]

What can we tell from the face? There're mixed data, but some show a pretty strong coherence between what is felt and what’s expressed on the face. Happiness, sadness, disgust, contempt, fear, anger, all have prototypic or characteristic facial expressions. In addition to that, you can tell whether two emotions are blended together. You can tell the difference between surprise and happiness, and surprise and anger, or surprise and sadness. You can also tell the strength of an emotion. There seems to be a relationship between the strength of the emotion and the strength of the contraction of the associated facial muscles. 

LAWRENCE IAN REED is a Visiting Assistant Professor of Psychology, Skidmore College. Lawrence Ian Reed's Edge Bio page


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Duck Sex, Aesthetic Evolution, and the Origin of Beauty

[9.3.14]

The way nature is—the nature of flowers, the nature of birdsong and bird plumages—implies that subjective experiences are fundamentally important in biology. That the world looks the way it does and is the way it is because of their vital importance as sources of selection in organic diversity, and as a result we need to structure evolutionary biology to recognize the aesthetic, recognize the subjective experience. 

RICHARD PRUM is an evolutionary ornithologist at Yale University, where he is the Curator of Ornithology and Head Curator of Vertebrate Zoology in the Yale Peabody Museum of Natural History. 

Richard Prum's Edge Bio Page


 

TALES FROM THE WORLD BEFORE YESTERDAY

[12.31.12]

The significance of the guy holding out his arm, dipping at the wrist, is that that's a gesture that magicians use to imitate the cassowary. The cassowary is New Guinea's biggest bird. It's flightless. It's like a small ostrich. Weighs up to 100 pounds. And it has razor-sharp legs that can disembowel a man. The sign of the cassowary, if you hold out your arm like this, that's the cassowary rolling its head and dipping its head when it's ready to charge. So magicians will imitate a cassowary in order to show their power. Because the cassowary's big and powerful. Magicians identify with the cassowary. They intimidate people.

JARED DIAMOND is Professor of Geography at the University of California, Los Angeles. His latest book, published today, is The World Until Yesterday: What Can We Learn from Traditional Societies? His other books include Collapse: How Societies Choose to Fail or Succeed, and the Pulitzer Prize-winning author of the widely acclaimed Guns, Germs, and Steel: the Fates of Human Societies, which is the winner of Britain's 1998 Rhone-Poulenc Science Book Prize. 

Jared Diamond's Edge Bio Page

 


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WHAT DO ANIMALS WANT?

[10.31.12]

Whatever anybody says, I feel that the hard problem of consciousness is still very hard, and to try and rest your ethical case on proving something that has baffled people for years seems to me to be not good for animals. Much, much better to say let's go for something tangible, something we can measure. Are the animals healthy, do they have what they want? Then if you can show that, then that's a much, much better basis for making your decisions.

MARIAN STAMP DAWKINS is professor of animal behaviour at the University of Oxford, where she heads the Animal Behaviour Research Group. She is the author of Why Animals Matter.

Marian Stamp Dawkin's Edge Bio Page


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BRAINS PLUS BRAWN

[10.17.12]

There are many other features in the head that help us become exceptional long-distance walkers and runners. I became obsessed with the idea that humans evolved to run long distances, evolved to walk long distances, basically evolved to use our bodies as athletes. These traces are there in our heads along with those brains.
 

DANIEL LIEBERMAN is Professor of Human Evolutionary Biology at Harvard University. His research combines experimental biology and paleontology to ask why and how the human body looks and functions the way it does. He is especially interested in the origin of bipedal walking, the biology and evolution of endurance running, and the evolution of the human head. He also loves to run.

Daniel Lieberman's Edge Bio Page


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TO BRING BACK THE EXTINCT

[8.28.12]

"One of the fundamental questions here is, is extinction a good thing? Is it "nature's way?" And if it's nature's way, who in the world says anyone should go about changing nature's way? If something was meant to go extinct, then who are we to screw around with it and bring it back? I don't think it's really nature's way. I think that the extinction that we've seen since man is 99.9 percent caused by man."


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WHAT IS LIFE? A 21st CENTURY PERSPECTIVE

[7.12.12]

"I was asked earlier whether the goal is to dissect what Schrödinger had spoken and written, or to present the new summary, and I always like to be forward-looking, so I won't give you a history lesson except for very briefly. I will present our findings on first on reading the genetic code, and then learning to synthesize and write the genetic code, and as many of you know, we synthesized an entire genome, booted it up to create an entirely new synthetic cell where every protein in the cell was based on the synthetic DNA code."


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