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Comment Re:Predictive power of evolution! (Score 5, Informative) 186

Thank you for making this post. It's good to see that someone out there understands this basic concept. Although, as a sister post notes, we do have a pretty good idea as to the cause of gravity.

Law of gravity: Objects attract each other according to their mass and the square of the distance between them. (F = GMm/R^2)

Theory of gravity: Gravity is caused by the interaction of gravitons at the quantum level, making gravity one of the basic forces.

Notice that theories describe the how and why of things, laws make concrete facts about the way things are.

Neither scientific laws or scientific theories (not to be confused with traffic laws or layman's theories, which describe different things entirely) are above being revised. In the case of laws, becoming more precise as our instruments become more precise, for instance, I believe that the universal gravitational constant (G, above) has been changed at various times as we are able to get better measurements. Theories, are often refined, partially revised, or scrapped altogether, often, we will use different theories depending on the model we are using (once again, scientific model, not like a car model, or like a car in general, get your analogies away from me! ;-) ).

The most important distinction between laws and theories, is that laws can be proven: measure the gravitational pull between two masses, if it fits the formula, voila! Gravity still works as predicted, the aprocralypse is not upon us yet. Theories, however, can only be disproven, you can say, "Gravitons cannot be the cause of gravity, here is my evidence, which the theory doesn't explain," but you cannot say, "Here is my proof that gravitons cause gravity." (you can try to get proof, but at most you will have a very strong correlation, which, as every slashdotter is fond of pointing out, does not prove causation.

"But," you say, "that means that everything we know could be a lie!" To which I reply, "Yes, yes it does, but that is unlikely, because most theories that actually have a name, have been shown to correlate with the facts very, very consistently, and although this doesn't prove causation, it's a pretty good indication that most of science is true."

Announcements

Submission + - Gorbachev says U.S. is sowing world disorder (reuters.com)

mr_musan writes: "It seems that not every one is over joyed at the USA's new push for power.

As Reuters is reporting from Moscow, "(The) Former Soviet president Mikhail Gorbachev criticized the United States, and current President George W. Bush in particular, on Friday for sowing disorder across the world by seeking to build an empire."

red all about it righ here http://www.reuters.com/article/worldNews/idUSL2755 110420070727?sp=true"

Censorship

Submission + - UK teachers want to ban Youtube

WombatDeath writes: The UK's Professional Association of Teachers is demanding that Youtube be shut down in order to remove threatening and bullying video footage from the internet. Following cases in which teachers have struggled to have individual clips removed, a spokeswoman for the PAT said that "Being exposed to ridicule, whether as an adult or young person, is a humiliating and frightening experience," adding "In the short term confronting this problem must be the closure of sites encouraging the cyber-bullying." Are new measures necessary to counter online bullying or, as Youtube asserts, are its existing processes able to deal with such situations?
Wii

Submission + - Wii bowling over U.S. retirees

murdock238 writes: ""That bet paid off. The Wii outsold the new Microsoft and Sony consoles in January and February and is generating its own buzz with everyone from nuns to cancer patients to toddlers. There are Wii parties and Wii bowling contests. Players, who often look quite silly and occasionally injure themselves in fits of overzealous play, upload video of their Wii antics to a variety of technology Web sites like GameTrailers.com and Google's YouTube. "I thought it was tremendous," said Ted Campbell, 77. Last week he played the Wii for the first time at Springfield, Virginia's Greenspring Retirement Community, where Ebert is also a resident.""

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