antimatter

Cells go through apoptosis, but they aren't a 'species'... http://www.straightdope.com/mailbag/mbugsuicide.html First result on Google.

Interesting, but I think he's really over-estimating. As someone on youtube already posted, it isn't going to be 100%. We shouldn't even strive for that. I think it's good that he's trying to change things (for the better), but IMHO there are better ways of doing it.

To the OP: I think this should help: http://en.wikipedia.org/wiki/Muscle_memory I don't think there's an exact number of times you have to do something; it most likely varies with each person.

I don't think it actually improves growth, just overall health of the hair. It certainly will look better, and grow normally, but I don't think it will grow faster (if that is what you mean). Thanks for the information Phi, I didn't know that soap was the bad for your hair. I always knew that it wasn't great for your hair, but I assumed that was just because I was biased against shampoo from a traumatizing experience when I was little (It got in my eyes, and didn't come out...

That's a little unnecessary. While not all of his post makes sense, he obviously put some thought into it, and it was rather interesting to read his ideas.

As my favorite science teacher once said: "Time definitely slows down when you feel pain. If you don't believe me, go home, and gently rest your face on your stove. I'm sure you'll see what I'm talking about after a few seconds."

The heating really isn't that bad. Sure, it shut off a few times, but that could be anything. All laptops heat up, and if they can't handle the heating they aren't a very good laptop.

The thing is, he isn't doing intensive things, which is why it threw me off a little. Donut.hole has a notorious history of over-estimating heat problems, but this was just odd. I did notice it shutting off once while attempting to play Red Alert 2 on it, but that's hardly strenuous.

Why, may I ask, does this interest you...?

Perhaps we are just viewing it a different angle than we normally view it? I'm not entirely sure myself, though I have thought about it before.

Ah, classic Pangloss. Well, what else are you looking for? It appears Elle88 is satisfied...

http://www.sciam.com/article.cfm?id=how-cells-clean-house&sc=SA_20080421 Is this the article? It says 'April 2008', but it was the only one that I could find.

Thanks for the explanation, that was very helpful. I'll go to the library tomorrow and check out the article. How exactly does the process break-down? As in; what causes it? (Apologies, I really don't know much about biology, despite my goal of being a doctor someday)

Ah, okay, I'll see if I can get a copy. My local library has almost every issue of sci-am. Autophagy? It seems like it's exactly what Alzheimer's is, from my limited reading.

I'm not entirely sure what the plaque buildups are. How do they affect the brain? What exactly are they?

Well, my grandmother has Alzheimer's, and after reading about it I can't really figure out why there isn't a cure for it yet. I have a general idea of what Alzheimer's is, and you could say that I'm very familiar with the symptoms. I believe my grandmother is in the 'moderate dementia' stage (http://en.wikipedia.org/wiki/Alzheimers#Characteristics), so it's probably a little late for her but if there was a cure, how long would it take to have effect? This obviously isn't organized very well, so I'll just write out my questions. 1. Why isn't there a cure? From what I've read it doesn't sound as untreatable as, say, AIDS. 2. If there was a cure that was administered in the pre-dementia or early dementia stage, how long would it take to 'fix' the loss of neurons? 3. What are the chances of me acquiring it? My great-grandmother had a very mild case, my grandmother has a very serious case, I'm not entirely sure about my mother yet. It seems to run from my mother's side of the family...primarily in females. I'm a male, so what are my chances? (I don't know anything about genetics, the last time I learned was in 8th grade when we learned some Mendelian genetics. Since then we've been learning Physics in science.) Thanks, antimatter

http://en.wikipedia.org/wiki/Sleep#Functions Is that enough?

So both laws can be used?

But how does a wing push air down? It doesn't really make sense. You'd expect the wing to 'cut' through the air, not force some of it down, so it gets pushed upwards. Bernoulli's still makes the most sense...

I was taught the same ideas rather recently, so reading that section of the book was interesting; it presented this idea I hadn't yet heard about. However, after some thought it didn't really make much sense...

A few days ago I started reading Ira Flatow's Present At The Future (On a recommendation), and in the introduction it discusses his misconceptions about why an airplane wing keeps a plane in the air. On the Bernoulli's Principle 'error': Apparently this is a very common error made by physics teachers across America. He says that: I'm not entirely sure this is true. The book doesn't give any math; just this explanation. One of my questions is: How does an airplane's wing make air go down? It doesn't really make sense to me. I have with me a physics textbook I permanantly 'borrowed' from my 8th grade science teacher, and in it it says: It seems that my textbook's explanation makes a bit more sense, but Flatow's also makes sense (with the exception of the 'air being pushed down by the wing'. Can anyone shed some light on this? (If this doesn't make sense, feel free to attribute it to the extremely high heat, and humidity, that's been preventing me from sleeping)

Well, that was extremely informative. Unfortunately I don't agree with the book when it mentions a 'soul'...that's when this thread leaves the realm of actual science...