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Comment Re:Danger??? (Score 4, Informative) 107

Actually, Great Whites don't even hunt us out of necessity: We are literally useless to them as food. All they ever do to us is take a bite, realize their mistake, and carry on looking for a worthwhile meal.

The trouble is, given their method of taking a bite involves slamming into their target at high speed and sinking hundreds of teeth in, you may well have been torn in half by the time they go "oops" and spit you back out...

Comment Excellent news! (Score 5, Informative) 107

As has been shown time after time, the loss of apex predators is disastrous for all levels of an ecosystem.

(If you want examples, check out http://en.wikipedia.org/wiki/H... - loss of wolves lead to over-grazing by elk; reintroducing them not only sorted the elk problem but boosted the numbers of beaver colonies, resulting in less erosion; pushed the cougars back to their traditional grounds; reduced the numbers of coyotes, which increased the number of foxes and thereby decreased the numbers of rodents, which altered the survival rates of various seeds and fungi... a whole cascade of improvements triggered by the return of a single predator.)

Comment Re:A nuisance, really... (Score 1) 135

> Carbon shows signs of potentially being rather nastier in its fancy forms

That's like saying "Some types of technology can harm your health".

Carbon is a very versatile element, it can take many forms. Some will be good, some will be bad, some will have no impact.

e.g. There are signs of it being extremely beneficial in buckyball form: http://www.gizmag.com/diet-buc...

Comment Re:I think more people would be interested... (Score 1) 194

Imagine you set up a ridiculously-powerful computer to simulate a universe - literally a particle-by-particle perfect simulation. (You might need this to be a fairly small universe, of course)

The simulation begins with everything in one tiny place and then it explodes outwards, cools down, matter starts to coagulate, etc. etc.

Within the simulation, there was no time before that universe's Big Bang. You could pause and even rewind the simulation and this could never be noticed from inside. The simulation only has 'knowledge' of what happens within the simulation.

Imagine your tiny universe evolves life, and it becomes intelligent. Can you imagine any way, any way at all, that that intelligent life could look at the simulated universe, and from it work out that it's a simulation? Can you think of a way they could find out what kind of computer it's running in? Can you imagine a way they could work out what the universe the computer exists in is like? Can you imagine any way, at all, in which the inhabitants of that universe could ever come to be aware of you yourself, unless you intervened and told them about yourself directly?

The difficulty that that simulated universe would have in working out how the computer works and what the rules of OUR universe are, are AT LEAST as great as the difficulties that we face in working out what, if anything, gave rise to our own universe. Questions like "What was before the Big Bang?" and "What's outside the Universe?" are at best almost impossibly difficult to answer, and at worst as meaningless as "Where's the end of a circle?"

That's why nobody's busy trying to find out. Now because nobody's interested, but because we don't even understand our own universe yet, so how the hell do we stand any chance of working out what's beyond it?

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