Showing posts with label skepticism. Show all posts
Showing posts with label skepticism. Show all posts

Tuesday, November 1, 2011

2012

For the first time, I'm watching the movie 2012. A friend asked me to and to tell him what I thought. So I thought, I'll tell everyone instead, and then send him the link.
Very quickly, for those who don't know, the gist of 2012 is that neutrinos from the sun heat the core of the Earth which results in extreme tectonic activity. Then the planets line up and electromagnetic fields go crazy and everything explodes. It looks great, but is the science even close to reality? No.
Neutrinos, at least many, do come from the sun. They are weakly interacting, neutrally charged particles. They don't do much, if anything, for us to be concerned about- though they are very interesting to particle physicists for reasons I won't pretend to fully understand. As far as heating up the Earth's core, that's about as laughable as saying that doing push-ups will knock Earth out of its orbit, though at least the push-ups hypothesis is somewhat realistic.
Neutrinos simply don't have the energy necessary to do so, and even if they did, since only about 1 in a 100 million actually collide with some atom in the planet, never mind in the core, it would take a truly astronomical amount to actually heat the planet. Let's explain the terms before we go on, though.
First, lets start with what "weakly interacting" means. There are 4 forces, gravity, electromagnetism, and the strong and weak forces. Gravity affects objects with mass, electromagnetism affects those with a charge, and the strong forces interact with particles such as protons and neutrons. The Weak Force only interacts with leptons, which includes neutrinos (and a handful of others), but it's extremely weak- it's quite a bit stronger than gravity, but with such tiny range it has been described as contact only.
Contact isn't as common as you might think, though- when we touch solid objects, we are really interacting with the electromagnetic force. Solid to us is actually almost entirely empty space. We "feel" solidity because both we and the objects we're touching are electrically charged- either positive or negative. Because neutrinos are neutrally charged, they can't interact with the electromagnetic force, so they pass right through.
Here goes- tedious (but fascinating, if you're into that sort of thing!) math ahead.
If they do interact, they've got a minuscule amount of energy anyway- between 2.2 eV and 15 or so MeV (Electron Volts and Mega Electron Volts, at 1 million each). An eV is an incredibly small amount of energy- 1 eV is equal to about 3.83 × 10^-20 calories. Even 15 MeV is only enough to make 0.0000000000006 calories. So, if the most energetic neutrinos were to hit the core, it would take 1.7 Trillion of them to raise the temperature 1 degree per cubic cm. However, since only 1 in 100000 actually interact with anything (contact only), we would need 17000 Trillion per cubic cm for 1 degree. To put that number in perspective, if it were in dollars, we could pay a half billion dollars to every US citizen (Man, woman and child) and still have money left over- 20000 Trillion dollars (which is still enough to pay for the country to run for the next 5000 years or more!). And that is just to raise 1 milliliter of the Earth 1 degree Celsius.
We must also realize that the Earth is cooling at the rate of 4.42 * 10^13 W, or about 10 Trillion Calories. Per Second. Which means, that, for the neutrinos just to equal our rate of heat loss, we would need 17 Trillion Trillion. Right- enough to pay every person on earth 200 times our entire national budget and run our country for 3 and a half billion millennia!
So, just to break even we need about 10^24 neutrinos coming at us.
Let's look at planetary alignment, supposed to worsen the neutrinos (already dispatched as an even likely form of trouble). The trouble with planetary alignment is gravity- all the planets line up, somehow magnifying their gravitational pull. While in the room with you (well outside your territorial bubble, at about 1 meter) I have about 0.2 % the gravitational pull of the moon on you. Not much, granted, but the moon is very massive. Jupiter, though, only has 5 times as much pull as me (about 1 percent of the moon)! And besides Venus (at 3 times my pull), none of the other planets can match my gravitational effect on you. And my pull is eclipsed by your car or your office! The point here is that gravity is a very weak force- and that distance matters ALOT. So, Earth and the moon are much closer to the sun than any of the other planets (except for Venus and Mercury), and their pull is negligible in comparison. Regardless of that fact, there's no reason for a planetary alignment to do anything more than cause a high tide on earth (it probably wouldn't, but at best that's all it'd do) and do absolutely nothing to the Sun- much less cause a solar flare, because solar flares are electromagnetic emissions- not gravitic ones!
The only thing in the movie even remotely possible was the solar ejections/flares becoming worse. This is problematic. Potentially, electrical grids could collapse as a massive electromagnetic field induces a current in every wire on Earth. We'd live through the initial hit, but without electricity (and without the possibility to restore it for years) we'd be devastated. That's scary- because it could actually happen. But we could recover. However, that would require an enormous solar flare (which has happened before) and a weakened magnetosphere on Earth's part. Possible, but not too likely.
There was one realistic point: Yellowstone is the site of the worlds largest inactive volcano. A very serious problem, and one we can do nothing about. A meteor coming for us, we can shoot down (or more likely, move out of the way). A gamma ray burst, we'll never see and will fry everything on the planet before we can scream. Besides, I'm handy with a handgun and a baseball bat if my kids or I get hungry (ain't nobody taking my food first), if we get to fight back to survive.
Yellowstone. The volcano- that will be an inevitable experience, worsened by being dragged out. We'll know it's coming and can't stop it. If we get a chance to escape, we'll die in the coming winter, or feast on the misfortune of our fellow men. It will be a terrifying and tormented death, which scares the piss out of me. But what can I do? It would obliterate everything from the Dakotas to the Mississippi river and beyond, crush the Rockies to dust and throw them into the Pacific, taking a chunk out of much of Canada and Mexico as well. The ashes would cover the planet, blocking the sun (and mitigating global warming!) and devastating all life. Cows (hell, cockroaches) would be lucky if they made it, and they'd be luckier than us. There's no way of preparing for such destruction on a global level- we're going to die or dramatically reduce global population, and we're talking 1 in 1000 if they're lucky. It's over, if Yellowstone blows. There's no way to prepare. All terrestrial life could end.
2012 was, as far as the science is concerned, a joke at best, and exploiting the conspiratorial among us at worst, taking advantage of the ones who don't understand the science. It reminds me of the Core, a movie from a few years back which boasted some of the most awful science in all of Hollywood history, actually provoking nightmares in yours truly (which I was still able to logic my way out of). Whenever you watch a movie that makes you question the future of the planet, grab a science geek and ask them what they think. We're usually thinking about the death of human society, when we aren't worried about getting laid (or leveling our D&D characters). My favorite (by which I mean "think most likely") is without a doubt the Yellowstone volcano.
Anyway, if only I had a nickel for every neutrino...

Thursday, September 2, 2010

Why pundits should stick to politics.

I didn't think it was possible that I could lose any more respect for Ann Coulter. How does one reduce an absolute value below zero? I don't agree with her on a single thing, but now I've heard her views on evolution. Trick question. It raised, just a smidge, when she said, "Evolution is compatible with my religion." I actually thought, in my sleep deprived brain, "I might actually agree with Ann Coulter on something!" Then she said, "but it isn't true." This is an excerpt from a debate between she and Bill Maher. The quality is pretty bad, and granted, neither one is particularly qualified to debate THIS topic, but it bled over from some political things they talked about. And got my blood boiling at 3 in the morning. Then it got me thinking.
To sum up the clip (the interesting bits, [except for Ann's gaff about the earth being 500 billion years old] start around 2:15 or so and continue almost to the end), Bill Maher is grilling her on the differences between voodoo and Genesis. He mentions evolution, and after being given the go ahead by the mediator, they begin the talk. She wrote a book (Godless: The Church of Liberalism) that talked a lot about evolution, and so was glad to tackle this topic with Bill.
Here are the claims that she got wrong, in approximately the order they occurred.
1) The Cambrian period, where there are all sorts of fossils which don't seem to have good origins from before. A fair point, but see my next blog for a detailed examination of this topic.
2) She claims the fossil record disproves evolution, that paleontologists are the most vociferous opponents of 2b)what she continually refers to as "Darwinism".
3) She keeps claiming that Darwin's evolution cannot be disproved.
4) She claims that the death of one type of organism is not an example of evolution.
5) She cites Behe's book, Darwin's Black Box, which refers to Irreducible Complexity.
Maher gets one wrong too, to be fair, though she did most of the talking.
6) Survival of the fittest = strong survive, weak die.
But back to Coulter,
7) Evolution is based on faith.

Fortunately, she's a very educated person, and she actually has at least a working knowledge of evolution. I'm putting her gaffs down to the point that her education is focused on art and law, and that she's probably not particularly interested in the natural sciences anyway. Medicine isn't that interesting to me, either. Bill Maher gave her an out, but she wouldn't take it, so we have to assume she has never heard of Punctuated Equilibrium. In spite of writing a book which dealt heavily with evolution, and having read at least one book about it, she is unaware of the mountain of evidence for evolution.

Points 1 and 6 will be dealt with heavily in my next blog post. There's a great deal there.
2) The fossil record was a problem, for Darwin, because there hadn't been thousands of scientists digging all over the world to find it. But now, the fossil record is actually one of the best proofs of evolution- it predicts transitional fossils, long before they were found. One of the things that makes or breaks a theory is it's predictive power- the ability to add new things to scientific knowledge. If a theory explains everything and predicts nothing, it is not a theory.
2b) This is a common claim by people trying to discredit evolution, but I wonder if it's not simply because they really think evolution hasn't changed since Darwin's day?
3)Now? Well, it seems increasingly unlikely. But, in the first 50 years or so, when lots of things were questionable? Sure. A dinosaur fossil in the Precambrian fossil record. A bat giving birth to a tomato. Poorly adapted organisms flourishing to the detriment of well adapted competing organisms. Any of these would disprove evolution, though the last would be the most shocking. As for the first, there are isolated instances where the layers of sediment may actually be jumbled up, due to some kind of cataclysm. If there were no evidence of that, just a fossil of, say, a leopluradon being eaten by trilobites, then sure. Evolution is bogus- or it has a LOT of explaining to do! The thing is, scientists flourish on disproving well established theories. The fastest way to become a rock star is publish something that flies in the face of an old theory. (2b) Because of this, evolution has already been modified, refined, and perfected over the years, as thousands of contributing scientists add to the global body of human knowledge.
4) She says that if we developed an antibiotic, that kills non-bald people, we wouldn't be evolving bald people. Obviously, a trivial and far fetched example, but lets set aside the details. No, we wouldn't. But, if we exposed this antibiotic to ALL humans, the humans who were resistant (ie., bald) would survive and reproduce. That's how evolution works, and she doesn't seem to get that. Killing a bunch of people with hair is not evolution. Killing ALL people with hair could be.
5) Irreducible complexity is, well, ignorant. It doesn't take into account how brilliant nature is at co-opting. The classic example is half an eye. Totally useless. But what about an eye that sees in black and white versus one that sees in low resolution? Or one that only detects light or darkness, without an image at all? And all of these would be preferable to no eyes at all.
7) Of course it is! In the same way that typing on a computer is based on faith, that turning on a light is based on faith, and that starting your car and hurtling down the highway at 75 mph is based on faith. In each instance, there are reinforcing experiences to give you a reason to believe that your reactions will be consistent in the future. The first time you get in a car to drive, you should probably be at least a bit nervous about getting on the highway with 2 tons of steel death surrounding you- but after practice and experience, it gets easier. If we didn't see lights come on every time we hit the switch, we probably wouldn't get annoyed when it doesn't work. If that's what she means by faith, then I agree. Of course, it isn't, and I don't. She means evolution is a religion. But at what point does it become more rational to not only believe in but expect miracles, which are, by definition, supposed to be extremely rare? It is not rational to believe that we will win the lottery if we by a single ticket. In the same way, belief in miracles can not be rational. It requires emotional support, in the lottery ticket's case, desperation. In religions case, faith. In evolution's case, neither- it is through the sweat and sacrifice of scientists, exhuming the evidence from long lost graves.
Finally, I ask you, Ann Coulter, if evolution is a religion, how is it compatible with yours?

Saturday, August 7, 2010

What's the harm? This is why science is important.

This is exactly the kind of thing that depresses me about humanity. To sum up:
A COUPLE allegedly tied up and tortured a teenage employee because a Vietnamese fortune teller told them she stole from them, a Darwin court has heard.

Nhung Tri Tran and Trien Tran pleaded guilty to assaulting Leilani dos Santos on February 17, but not guilty yesterday to threatening to kill her and depriving her of her liberty.

...a Vietnamese fortune teller told the couple the person who had stolen the handbag was close to them, and was someone they loved.

Ms Tran also allegedly told Ms dos Santos they would cut off her fingers, but they loved her and would inject her with heroin, so she would not feel it.

Ms dos Santos said Mr Tran beat her in the back with a meat cleaver, threatened her with a samurai sword and burnt her arm with a cigarette.

Ms dos Santos said the couple had a Lady Gaga CD playing loudly.

There are a few things to this story, but one that jumps out at me is regardless of how much she stole, there's no justification for being subjected to loud Lady Gaga. This is exactly my problem with non-evidence based world views: it's not the everyday people that go around doing insane things, but as long as this kind of irrational, delusional belief is encouraged, we leave ourselves open to just this kind of abuse. Those in the "psychic" industry need to be more responsible (I'm looking at you, Sylvia Browne).
Granted, the egregious abuse in this story may be telling of a serious mental health issue, suffered by the Trans, or even dos Santos- that's beside my point. I'm not interested in placing guilt, or even blame- the fortune teller had a job to do, the Trans had a business to run, and the victim is right to sue for damages.
What I want to examine is the kind of person that could take something like this seriously. Why would anyone even believe in a fortune teller, for one thing? For the exact same reason one believes in magnet therapy, chiropractic, homeopathy, witches, or breaking mirrors for bad luck (or glasses for good luck). Because they've been told it's true. That's all it boils down to- and society plays it off as harmless, which it is, most of the time. Most Christians I know go to doctors, and get vaccinated (even if they refuse to accept the theory of gravity).
<> There are lists of cases as long as my arm where kids are neglected to death, or even murdered, by their parents because of their ridiculous beliefs. When people take homeopathic talismans to protect them from malaria. Men in Africa sleep with virgins to be cured of AIDS (also, see the even more depressing dissenting opinion here). Vultures are hunted to near extinction for gambling on soccer. Rhinos are killed to make ineffective potions against arthritis. Tigers are killed to make manly wards.
So yes, I get upset when otherwise intelligent people ignorantly ruin our planet, kill our innocents, or spread disease needlessly, because they want to believe in superstitious drivel.
< /Rant >
I feel that people believe this sort of nonsense because of the way we're wired. I'll use myself as an example, though according to studies of human beliefs, many people fall into these (and other) traps. 1.) I know that if someone tells me something confidently, I'll be inclined to believe them without trying to verify it. 2.) Similarly, if I hear something multiple times, or I read it in several places, I'll be inclined to believe it. 3.) I also know that if I already believe something, or am inclined to believe it, that I'll tend to remember the things that confirm belief.
I could go on, but let's stick with those three.
1.) Obviously, this is a terrible reason to believe something! And yet, most of us will, and salesmen and preachers alike take full advantage. There are two things I do to avoid this tendency toward blindly obeying. First, I avoid making decisions when caught up in the moment. I give myself a chance to cool off and think about my actions. Second, if I catch myself doing this, I do research to find out whether it's justified.
2.) Just because a billion people believe something, doesn't make it true. One thing that makes this one so dangerous is because of our tendency to gossip and spread rumors. When at all possible, I go directly to the source, if it's about someone, or I verify the story with multiple sources (as above, when I mentioned the dissenting opinion on the virgin cure of AIDS myth).
3.) This is also called confirmation bias, and this one can be tricky to countervail. To do so, I must, on a regular basis, actively seek out dissenting information and re-evaluate my beliefs on a given topic. For instance, after catching myself uncritically repeating the above AIDS myth, I've done some more research- and sadly, it holds up.
The dissenting story was saying that the infant rape in South Africa had nothing to do with the Virgin Cure myth- it still exists. People believe you can cure an STD by transferring it to a virgin. And that's the harm.

Friday, August 6, 2010

Raising Kids Without God

As a single atheistic parent in the veritable buckle on the bible belt, it can be difficult. What do I do about the god thing? Well, biologically, my kids are at the age where they should, with very little reservation, believe anything they're told by an adult. That, coupled with the fact that atheism for me is a simple extension of skepticism and rationality, makes it difficult for me. On the one hand, realizing that there was no god was an incredibly liberating experience- ironically, one of the most legitimately religious experience of my life- and I'd like my children to realize that. But, the more important issue to me is thinking for oneself. As such, just like with Santa Claus, the Easter Bunny, and the Tooth Fairy, I'm keeping my mouth shut, and asking questions, and encouraging the kids to ask questions. Telling them the answer is like helping them cheat on a fundamental, and incredibly easy, test in life.
What I do do, mostly out of fun, is talk about Jesus or Muhammad(PB&J) with the same reverence I discuss Thor, Ra, Zeus, and leprechauns. And for the most part, they see them as they truly are, irrelevant to our lives. That's actually all I want- I hope the time for atheism is drawing to a close. There are so many more things of far more interest out there.
The important thing is ultimately, as a human species, we've outgrown the need for religion. It's still hanging around, and probably will, realistically, for hundreds of years more. But there are better sources, now, for anything that religion can offer. Better sources for community, for morality, for indulging our musical whims, for inspiration and guidance when we go astray, and plenty of real, tangible reasons to be good. Like Sesame Street, I don't believe there's much to be learned from religion at this stage in our development. It kept us from annihilating ourselves, but we're adults now, most of us, and quite capable of taking the next step into the future together. My fear is that those who cling so strongly to the history of our species that, in fear of venturing from their caves and finding a path in this marvelous present, they will turn the world's future into their apocalypse.
In an uncharacteristically beautiful and inspired chapter, the words of Paul the Apostle resonate with me. "When I was a child, I spake as a child, I understood as a child, I thought as a child: but when I became a man, I put away childish things." 1 Cor 13:11, KJV