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Tuesday, Feb 13, 2001 5:27 PM UTC2001-02-13T17:27:00Zl, M j, Y g:i A T

Size doesn’t matter

As scientists unveil the human genome findings, it turns out we have a lot fewer genes than we'd thought, and not many more than a fruit fly.

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If fate is truly written in our genes, it must be some cosmic scriptwriter’s idea of a joke. Because our genetic code is awfully similar to that of the fruit fly.

In a Washington hotel room jammed with Nobel laureates and other brainiacs, two competing groups of researchers presented the 3 billion letters of the human genome to the public Monday with a whimper of surprise. Human genes, it turns out, are remarkably similar to those of lower life forms. Whatever it is that makes us unique is probably not solely in the code that DNA uses to instruct our cells to make proteins.

The biggest surprise of the rough analysis of the first sequencing of the human genome was the number of genes it contains. For years scientists had been predicting that human DNA would contain somewhere between 100,000 and 140,000 genes. It turns out we may have as few as 26,000 — a genome about the size of a corn plant, with roughly a third more genes than the fruit fly.

When it comes to numbers of genes, size definitely does not matter. Not only that, but our genes look pretty similar, in structure, to most of the genes in fruit flies, roundworms and even brewer’s yeast.

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Arthur Allen writes on health, science and other issues for Salon. He lives in Washington.  More Arthur Allen

Saturday, Feb 18, 2012 2:00 PM UTC2012-02-18T14:00:00Zl, M j, Y g:i A T

The science of rubbernecking

Humans aren't the only creatures who like staring at morbid disaster. What draws us to it?

Why we love looking at train wrecks (excerpt from Why we love looking at train wrecks)

 (Credit: visuelldesign via Shutterstock)

This article was adapted from the new book "Everyone Loves a Good Train Wreck: Why We Can't Look Away" from Sarah Crichton Books.

“Don’t look.”

That’s what she asked, more than once. I heard her distinctly each time, and told myself I should oblige, and even once partially turned my head in her direction, but I just couldn’t take my eyes off the screen. I engrossed myself again, and again submitted to the anger, the sorrow, the fear, as well as guilt’s perverse pleasure: I felt that I shouldn’t be doing this, but I was doing it anyway, and got a peevish thrill from my transgression.

It was evening, dinnertime, and this had been going on since morning, right before I left for work. I had just finished breakfast. I had my satchel over my shoulder. It contained my books for that day’s class (on Keats’s “To Autumn”) and also my lunch (a peanut butter sandwich). I had my hand on the doorknob, ready to leave, when Sandi, my wife, ran up to me, phone in hand, and said, “Turn on the TV.”

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Eric G. Wilson is the Thomas H. Pritchard Professor of English at Wake Forest University in Winston-Salem, North Carolina. He is the author of "Against Happiness: In Praise of Melancholy," "The Mercy of Eternity: A Memoir of Depression and Grace," and five books on the relationship between literature and psychology.  More Eric G. Wilson

Saturday, Jan 28, 2012 10:00 PM UTC2012-01-28T22:00:00Zl, M j, Y g:i A T

The neuroscience of happiness

New discoveries are shedding light on the activities that make us happy. An expert explains

The neuroscience of happiness

 (Credit: Zurijeta via Shutterstock)

They say money can’t buy happiness. But can a better understanding of your brain? As recent breakthroughs in cognitive science break new ground in the study of consciousness — and its relationship to the physical body — the mysteries of the mind are rapidly becoming less mysterious. But does this mean we’ll soon be able to locate a formula for good cheer?

Shimon Edelman, a cognitive expert and professor of psychology at Cornell University, offers some insight in “The Happiness of Pursuit: What Neuroscience Can Teach Us About the Good Life.” In his new book, Edelman walks the reader through the brain’s basic computational skills – its ability to compute information, perform statistical analysis and weigh value judgments in daily life – as a way to explain our relationship with happiness. Our capacity to retain memories and develop foresight allows us to plan for the future, says Edelman, by using a mental “personal space-time machine” that jumps between past, present and future. It’s through this process of motivation, perception, thinking, followed by motor movement, that we’re able not only to survive, but to feel happy. From Bayes’ theorem of probability to Shakespeare’s “Romeo and Juliet,” Edelman offers a range of references and allegories to explain why a changing, growing self, constantly shaped by new experiences, is happier than the satisfaction any end goal can give us. It turns out the rewards we get for learning and understanding the workings of the world really make it the journey, not the destination, that matters most.

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Lucy McKeon is an editorial fellow at Salon.   More Lucy McKeon

Saturday, Jan 21, 2012 4:00 PM UTC2012-01-21T16:00:00Zl, M j, Y g:i A T

Rise of the Super-Earths

Astronomers have discovered a giant new kind of planet that could hold life -- and they could change everything

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This article is an adapted excerpt from the upcoming book, "The Life of Super-Earths," available on January 23 from Basic Books.

We love our planet Earth. We should — it is our home, and there’s no place like home. There can’t ever be a better place than Earth. Plenty of serious science literature supports that view in an emotionally detached manner. It is often called the “Goldilocks hypothesis”: the Earth is just the right size (not too big, not too small) and just the right temperature (not too hot, not too cold) for life to emerge here. Life is a rare thing. Perched on our little planet, we can’t see any other out there, or at least not yet — so a certain dose of Earth-centrism seems justified. Or is it?

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Dimitar Sasselov is a professor of astronomy at Harvard University and the founder and director of the Harvard Origins of Life Initiative. His research has been covered by the New York Times, the Boston Globe and others. He lives in Boston, Mass.   More Dimitar Sasselov

Monday, Jan 9, 2012 1:00 AM UTC2012-01-09T01:00:00Zl, M j, Y g:i A T

“Stephen Hawking: An Unfettered Mind”: Portrait of a genius

A new biography of the world's most famous scientist celebrates his spirit and his ideas

stephen hawking

Stephen Hawking is the world’s most famous living scientist for two reasons that (despite his own wishes in the matter) are impossible to disentangle. The first is his disability, a motor neuron disease related to amyotrophic lateral sclerosis (ALS, often referred to as Lou Gehrig’s disease) that, beginning in his late teens, has rendered him severely disabled. Most people, when diagnosed with ALS, live only a few more years; Hawking has survived for 49, turning 70 on Jan. 8. The second source of renown is his work as a theoretical physicist and cosmologist, particularly on the nature of black holes and the origin of the universe.

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Laura Miller

Laura Miller is a senior writer for Salon. She is the author of "The Magician's Book: A Skeptic's Adventures in Narnia" and has a Web site, magiciansbook.comMore Laura Miller

Saturday, Dec 31, 2011 9:00 PM UTC2011-12-31T21:00:00Zl, M j, Y g:i A T

Should we erase painful memories?

"Eternal Sunshine of the Spotless Mind" could soon become a reality -- but the concept raises some thorny questions

eternal sunshine

This article was adapted from the upcoming book, "Memory: Fragments of a Modern History," available in January from the University of Chicago Press.

One of the most tenacious themes of 20th-century memory research was the idea that people tormented by the memories of terrible experiences could benefit from remembering them, and from remembering them better. The assumption — broadly indebted to psychoanalysis — was that psychological records of traumatic events often failed to be fully “integrated” into conscious memories. As long as these records remained “dissociated,” the sufferer was compelled to “relive” them instead of benignly remembering them. The more fully and appropriately one remembered terrible events, the more attenuated would be their emotional power.

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Alison Winter is an associate professor of history at the University of Chicago and the author of "Mesmerized: Powers of Mind in Victorian Britain," also published by the University of Chicago Press.   More Alison Winter

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