Category Archives: Science

Evolution Stadium

How far removed are we from our proto-human ancestors? Not as much as one would think. Richard Wrangham has a creative way to illustrate that in the beginning of his book Catching Fire: How Cooking Made Us Human:

Although the australopithecines were far different from us, in the big scheme of things they lived not so long ago. Imagine going to a sporting event with sixty thousand seats around the stadium. You arrive early with your grandmother, and the two of you take the first seats. Next to your grandmother sits her grandmother, your great-great-grandmother. Next to her is your great-great-great-great-grandmother. The stadium fills with the ghosts of preceding grandmothers. An hour later the seat next to you is occupied by the last to sit down, the ancestor of you all. She nudges your elbow, and you turn to find a strange nonhuman face. Beneath a low forehead and big brow-ridge, bright dark eyes surmount a massive jaw. Her long, muscular arms and short legs intimate her gymnastic climbing ability. She is your ancestor and an australopithecine, hardly a companion your grandmother can be expected to enjoy. She grabs an overhead beam and swings away over the crowd to steal some peanuts from a vendor.

Evolution may happen at glacial pace from our perspective. But if you zoom out a bit, it happens incredibly fast. Interesting stuff.

Sagan on Certainty

Wisdom and humility from Carl Sagan:

Humans may crave absolute certainty; they may aspire to it; they may pretend, as partisans of certain religions do, to have attained it. But the history of science – by far the most successful claim to knowledge accessible to humans – teaches that the most we can hope for is successive improvement in our understanding, learning from our mistakes, an asymptotic approach to the Universe, but with the proviso that absolute certainty will always elude.

We will always be mired in error.

-Carl Sagan, Demon-Haunted World, location 627 in the Kindle edition.

For my own thoughts on this kind of capital-C Certainty, see here, here, here, and here.

The Physics Nobel and Human Achievement

While we’re on the topic of human achievement, The Daily Caller was kind enough to run an article I wrote about this year’s physics Nobel laureates, Saul Perlmutter, Brian Schmidt, and Adam Reiss. They discovered the accelerating universe. Here’s a taste:

Perlmutter, Schmidt, and Reiss have shrunk man’s already tiny position in both space and time. But they — and we — still stand tall. If little old us can look through a metal tube with glass discs stuck in it (or radio telescopes, which rely on light we can’t even see), and infer from dim and ancient supernovae, millions of light years away, that the universe’s expansion is accelerating — well, that’s a very big achievement for such a small species.

And we’re capable of much, much more. Our universe may die in ice in the distant future. But until then, we will live well. Or rather, we will so long as human achievements like Perlmutter, Schmidt, and Reiss’ are encouraged, valued, and rewarded.

Read the whole thing here. Interested readers might also enjoy Mario Livio’s book The Accelerating Universe and Fred Adams and Greg Laughlin’s Five Ages of the Universe: Inside the Physics of Eternity.

The Neuroscience Behind Partisanship

I’m very much enjoying Michael Shermer’s new book The Believing Brain. It’s about how the brain forms beliefs, why people hold on to their beliefs so strongly, and why people believe in weird things like ghosts and conspiracy theories.

On p. 260, Shermer quotes from a study (pdf) by Drew Westen, et al, where his team ran fMRI scans on the brains of political partisans to see what parts of their brains were firing when engaged in political dispute:

We did not see any increased activation of the parts of the brain normally engaged during reasoning. What we saw instead was a network of emotion circuits lighting up… Essentially, it appears as if partisans twirl the cognitive kaleidascope until they get the conclusions they want, and then they get massively reinforced for it, with the elimination of negative emotional states and activation of positive ones.

There you have it: scientific proof that partisans aren’t quite right in the head.

Cell Phones Don’t Cause Cancer

Over at the Daily Caller, I debunk the fear that long-term cell phone use can cause brain tumors. San Francisco and Maine already have warning label regulations on the books. Rep. Dennis Kucinich has introduced federal warning label legislation. Here are the main reasons they’re wasting their time:

-Activists promoting the scare only ever mention brain tumors. But you hold your cell phone in your hand. You hold it next to your ear and your jaw. Why no mention of those cancers? Suspicious.

-Most phones only emit one watt of energy. The human body generates about a hundred times that much energy during normal, everyday activity. Adding a single watt to that baseline does nothing to contribute to the DNA damage that can lead to tumor growth.

-Cell phone photons are so weak, they fall short of DNA-damaging energy levels by about a factor of 500,000. So you might have something to worry about if you strapped half a million cell phones to your body. That would be getting crushed to death, not cancer. Phones don’t operate at cancer-causing frequencies.

Cell Phone Cancer Scare Refuses to Die

Some people are scared that cell phones cause brain tumors. There are enough of these bedwetters that San Francisco just passed a new law to “require all retailers to display the amount of radiation each phone emits.”

For most phones, that’s roughly one watt; the legal limit in the U.S. is 1.6 watts.

Studies have yet to find a link between cell phones and brain cancer. The main reason is that it is physically impossible; one watt of radiation just isn’t enough to cause any tissue damage.

The human body naturally generates about 100 times as much energy at rest, and 1000 times as much during exercise. One measly watt isn’t enough to affect anything.

One wonders why the bed-wetters are only worried about brain cancer; cell phones are held in the hand. And unlike the brain, which is shielded by hair, scalp, and skull, the hand is completely unprotected from cell phone radiation. If cell phones did cause cancer, activists should be at least as worried about skin and bone cancers in the hand.

But they aren’t. One reason is that those cancers don’t sound as scary as brain tumors do; it’s harder to get people worked up and frightened.

The other reason is that cell phones don’t cause cancer. Not in the hand. Not in the brain. Not in the face, the, jaw, or any other body part might take the brunt of the single watt of energy our cell phones emit.

The Color of Dinosaurs

Scientists have figured out how to tell what color some dinosaurs were just by looking at their fossils.

Here’s how they did it:

Dr. Prum and his colleagues took advantage of the fact that feathers contain pigment-loaded sacs called melanosomes. In 2009, they demonstrated that melanosomes survived for millions of years in fossil bird feathers. The shape and arrangement of melanosomes help produce the color of feathers, so the scientists were able to get clues about the color of fossil feathers from their melanosomes alone.

Human ingenuity never ceases to amaze.

State of the Union Live-Blog

Meant to post this earlier. Here’s last night’s live-blog of the State of the Union:

8:46 Welcome to CEI’s live-blog of the 2010 State of the Union address. President Obama will be touching on all kinds of issues tonight. And I’ll have something to say about them all. But I’ll be paying special attention to what he has to say about regulation and spending. Keep refreshing this post every few minutes for fresh commentary.

8:54 Important people are filing in. Pundits are bloviating. Welcome to Washington.

8:58 Here comes the cabinet.

9:00 Peter Orszag and Christina Romer are there. Romer has done some excellent research on the Great Depression, by the way. Any monetarists out there would find much to like about what she has to say about monetary policy vs. fiscal policy.

9:06 The President enters. Much applause.

9:06 While waiting for the applause to die down, I’ll add that Romer thinks that monetary policy is what drives business cycles. Fiscal policy, such as stimulus spending, has little effect. I largely agree.

9:10 Speaker Pelosi introduces the President. Much applause. Many “thank yous.”

9:11 It begins.

9:11 He refers to the Constitution. Heh.

9:12 American exceptionalism. Neocons cheering somewhere, no doubt.

9:13 He inherited a bad situation. True enough. We must act? Not so much. The recession is largely a creation of over-active monetary and regulatory policy. Not a lack of policy.

9:14 First reference to “the children.”

9:15 He has said both “hope” and “change” already. Campaign 2012 has begun.

9:17 First standing ovation.

9:18 A government that matches our decency? Public choice theory is unknown on Capitol Hill, apparently.

9:18 He hates the bailout. Good! Why did he go through with it, then?

9:18 It was necessary. Unemployment would have doubled. Hyperbole. Now banks know they can continue taking stupid risks and get bailed out for it.

9:19 touts his fee on big banks that received bailouts.

9:20 20 tax cuts. Net tax cuts. While spending goes through the moon. Tax cuts are great, but spending cuts are more important. A tax cut now is a tax increase later if spending isn’t cut to match. An increase. Not a decrease. An increase.

9:22 Many jobs created. Touting the stimulus. Which takes money out of the economy, wastes some of it on bureaucracy, then puts it back into the economy. First instance of the broken window fallacy.

9:23 Anecdotes, people helped by stimulus spending. He sees what is seen. But not what is unseen. Those jobs, and that money, came from somewhere else. Each job created is one lost elsewhere.

9:25 Jobs, jobs, jobs. Bryan Caplan’s make-work bias lives.

9:25 Business creates jobs. Government can help. But only by taking money from somewhere else, and hurting businesses elsewhere. No net effect.

9:26 $30 billion transfer from “Wall Street” to “small businesses.”

9:27 small business tax credit. Eliminate capital gains tax on small businesses. Nice, but tax code simplification would be better. Lobbyists will be all over this one.

9:28 Infrastructure!

9:28 Rail! It’s the 19th century all over again.

9:29 Clean energy. Higher energy bills for all!

9:29 Keep jobs in America! Efficiency be damned! USA! USA! USA!

9:30 Jobs bill, ASAP. But full employment requires…

9:31 still waiting…

9:32 still waiting… the virtues of China’s economy…

9:33 financial reform! For starters. But don’t punish banks. Prevent recklessness. Good. Prevent dumb risks. House has already passed some reform. But lobbyists are all over.

9:34 And they will be as long as Washington is doling out money.

9:34 Plank 2: Innovation and science. More clean energy. More nuclear power. More offshore oil. More biofuels and clean coal. Comprehensive clean energy bil. Cap-and-trade light?

9:36 Consensus on global warming. Jeers from the crowd. Acknowledges doubts, touts clean energy again.

9:37 Plank 3 – trade. More exports! Double them in 5 years = 2 million jobs. National export initiative. Trade, of course, has almost zero effect on the number of jobs. It only affects the kinds of jobs. Also take measures to decrease imports. Renegotiate Doha. Is this a new protectionism?

9:40 4th plank – education. Only reward success. Not failure. Nice. Of course, that would mean less federal involvement in education, not more. Washington has no idea how to educate kids hundreds or thousands of miles away.

9:41 End taxpayer subsidy to banks for college loans. Substitute a tax credit and increase Pell grants. Forgive student loans after 20 years. Why bother paying back, then? This will bode well for future deficits.

9:43 Social Security fix – lend more to homeowners. Yeesh.

9:43 Health care!

9:44 Acknowledges unpopularity.

9:44 Anecdotes!

9:45 Blames insurance industry for regulatory failures. Emphasis on preventive care; no empirical research is cited for obvious reasons.

9:46 We can save money by spending money.

9:46 Reduce deficit by $1 trillion over 20 years. Last year and this year alone will incur nearly $3 trillion in deficits.

9:47 Temperatures cooling? Oh wait, he’s talking about health care.

9:48 Open to other proposals. Not bloody likely.

9:48 Pass a health care bill, any health care bill.

9:49 Spending.

9:50 Blames Bush for the deficit. Rightly so! Where’s he going with this, though?

9:51 Adding debt was the right thing to do. No mention of “the children” who will ultimately pay for it.

9:51 freeze certain types of discretionary spending for three years. This excludes most spending.

9:52. Save $20 billion this year. Or less than one percent of total spending.

9:53 Bi-partisan fiscal commission. Not exactly the Gramm Commission. Good idea, but beware the execution. Wayne Crews and I have done some research on this.

9:54 Pay-Go budget keeps spending in line. The data say otherwise.

9:54 Oh, the freeze won’t take effect until next year. The crowd laughs.

9:55 Says Bush cut regulations. Actually, he passed more than 30,000. See CEI’s Ten Thousand Commandments study for the exact numbers.

9;56 Deficit of trust in Washington, not just dollars. There’s a reason for that, you know. Two of them are the Republican and Democratic parties.

9:57 Excluded lobbyists from policymaking jobs. That isn’t actually true.

9:58 Doesn’t like the Citizens United decision. Or the First Amendment, for that matter. Wants a new campaign finance regulation bill. Presumably so it can be struck down on First Amendment grounds like the last ones.

9:59 I’m liking what he has to say on earmarks. Good luck to you, sir.

10:00 “can’t wage a perpetual campaign.” Tell that to Organizing for America.

10:01 Partisan politics get in the way of doing things. He’s right. And that’s exactly why I like gridlock.

10:02 Hey Republicans, no filibusters, please.

10:03 Will be talking more to the other side of the aisle.

10:03 National security!

10:04 Hope again. I haven’t been keeping track, but that’s at least 3.

10:05 Start getting out of Afghanistan in mid-2011. Good!

10:06 Out of Iraq by August. Good! Foreign aid to Iraq. Bad for Iraq!

10:07 Pork for veterans. Taking a page right out of the Gracchi playbook.

10:08 Nuclear deproliferation. I applaud the sentiment, but prohibition doesn’t work. Good luck to you, sir.

10:11 Would love to hear what Bill Easterly has to say about all the government-to-government transfer programs he’s touting.

10:12 Haiti. I completely agree with the ends. But the effectiveness of the means needs to be questioned.

10:13 Hate crimes. Thought crimes?

10:14 Let gays in the military. Nice! About bloody time.

10:14 Immigration. He has a positive view of immigration. Let’s hope that means much-needed liberalization. The more immigrants, the better. Those who are illegal, make them legal. It is the right thing to do. Obama says this is bi-partisan. I wish he was right.

10:16 Decries cynicism. There’s a reason for all that, you know.

10:19 Anecdote!

10:19 Another anecdote!

10:19 A third!

10:20 A fourth!

10:20 “I don’t quit!” Reminds me of Brett Favre’s advice to a startled referee: take two weeks off, then quit.”

10:21 End of speech.

10:26 Here comes Bob McDonnell’s Republican response. Get ready to be disappointed!

10:30 Thank yous and much applause.

10:31 Jobs. Jobs for all! Good end. The means?

10:31 So far, indistinguishable from Obama.

10:32 Calls for less taxation, regulation, etc. Quotes Jefferson. Says government is trying to do too much. Now he sounds different.

10:33 Likes Obama’s spending freeze. Says it’s small. Not often one hears a politician calls a spending non-increase anything other than draconian.

10:34 Likes bipartisanship. I like gridlock. Boo!

10:34 Likes the Shadegg health insurance reform. And medical malpractice reform. No specifics, though.

10:35 Energy. More of everything! Why isn;t anyone saying, “let the market decide?” Why must government, no matter the party, pick winners and losers?

10:36 Government energy policy can create jobs. Oh, wait, that costs money and jobs from elsewhere. Broken window fallacy again.

10:37 Education. Likes merit pay and school choice. Nothing about reducing federal involvement in this state and local issue.

10:38 Wars abroad. Daughter served abroad. Laudable. But nothing to do with the merits of nation-building.

10:39 Doesn’t like giving due process to the underwear bomber. Well, he’s probably guilty. Let’s find that out for sure and then punish him accordingly, then! What’s to be gained from denying due process?

10:40 I’m liking his rhetoric about taxes, spending, and regulation. But I’ll believe it when I see it. Which is probably never.

10:41 Haiti. Less than a paragraph.

10:42 Big role for government in creating opportunity.

10:43 One more call for bipartisanship, and a big sop to the Religious Right. An utterly conventional speech. If you thought liberals and conservatives have fundamental philosophical differences, think again. Two sides of the same coin.

10:44 That’s all for tonight. CEI scholars will have more in-depth analysis for you tomorrow. Thanks for reading!

Cell Phones, Cancer, and Certainty

cell phone-2

CNN reports: “Last summer, Dr. Ronald Herberman, then director of the University of Pittsburgh Cancer Institute, issued a warning to about 3,000 faculty and staff, listing steps to avoid harmful electromagnetic radiation from cell phones.”

“Electromagnetic radiation” is a fancy way of saying light waves.

Herberman has been on his cell phone crusade for a while now; I diagnosed him with a severe case of The Certainty last year.

Still, let’s assume he’s right that cell phones cause tumors. What actions should be taken? I present the following CDC data on leading causes of death as a way to guide our priorities:

Heart disease: 631,636
Cancer: 559,888
Stroke (cerebrovascular diseases): 137,119
Chronic lower respiratory diseases: 124,583
Accidents (unintentional injuries): 121,599
Diabetes: 72,449
Alzheimer’s disease: 72,432
Influenza and Pneumonia: 56,326
Nephritis, nephrotic syndrome, and nephrosis: 45,344
Septicemia: 34,234

Deaths from cancer attributable to cell phone use? Zero. There is an important lesson to be learned here.

Think of it like this: every dollar and every hour of researchers’ time spent investigating cancer risks from cell phones is money and time not spent curing heart disease. Or cancer itself. Or stroke. These “big three” combine to end more than a million lives each and every year.

Which is a better use of limited research resources? Herberman, by bringing funding and attention to a non-issue, is quite possibly costing lives that could otherwise be saved.

The Certainty has very high costs. In Herberman’s case,  measurable in lives.

Funny, That

An article in today’s New York Times laments the difficulty of “building momentum for an international climate treaty at a time when global temperatures have been relatively stable for a decade and may even drop in the next few years.”