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The Dominant Life Form In the Cosmos Is Probably Superintelligent Robots

ByteSlicer Re:von Neumann probes (354 comments)

Typo: 1:4:5->1:4:9

yesterday
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The Dominant Life Form In the Cosmos Is Probably Superintelligent Robots

ByteSlicer Re:von Neumann probes (354 comments)

A real head-scratching conundrum about the universe is explaining why it's not already overrun with self-replicating robots.

Nah, that's easy : it actually *is* overrun, what else do you think all the dark matter is?
These robots are monoliths with ratios 1:4:5. Because they are black and full of stars, they are very hard to see against the cosmic background.

yesterday
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Philae's Batteries Have Drained; Comet Lander Sleeps

ByteSlicer Re:We may hear from Philae later (337 comments)

Of course, the comet will also start shooting off monster steam blasts, which could easily blast Philae off at escape velocity.

Only in Hollywood movies.

Meanwhile they asked this question to the ESA people (watch the press conference), and it turns out that (1) the expected mass emissions of the comet are not that large, so no monster blasts, and (2) the lander is still pretty massive (about a metric tonne) so it has a large inertia, and will be hard to move by the escaping gas. In summary, they didn't expect it to go anywhere soon (unless it got hit by a meteoroid).

about a month ago
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Phase-Changing Material Created For Robots

ByteSlicer Re:um... (35 comments)

It's just like the Terminator

It's a liquid that is almost, but not quite, entirely unlike the Terminator.

about 5 months ago
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Fresh Evidence Supports Higgs Boson Discovery

ByteSlicer Re:The science is not settled on this. (42 comments)

They have strong indications that the particle is spin-0.
In the plot, blue is the expected data for spin-0, red for spin-2. The black line is derived from measurements and nicely corresponds with the peak of spin-0.
See also here.

about 6 months ago
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Happy 95th Anniversary, Relativity

ByteSlicer Re:95 years but (120 comments)

There's no such thing as a passive detector.

Sure there is. There is nothing special about a detector. If you can put a whole cat (=a bunch of atoms) in a superposition of quantum states, you can also include the detector (=a bunch of atoms) in that superposition.

It only works if the inside of the box (including the detector) is isolated from the rest of the universe. Then there is a superposition of 2 states: (1) the radioisotope didn't decay, the detector detected nothing, the cat is alive; and (2) the radioisotope decayed, the detector detected the emitted particle and released the neurotoxin, the cat died.

Once you break isolation (i.e. coherence), the rest of the universe entangles (at random) with one of these states, and the other state "collapses".

The big question is: what happens with the collapsed state? Was it absorbed in the other state? Did it entangle with a parallel universe? Did it become disconnected from reality?

about 7 months ago
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Is It Really GPS If It Doesn't Use Satellites?

ByteSlicer Re:Well ... (298 comments)

If you're going to call things that aren't GPS as GPS, then you might as well call navigating by the stars GPS.

We call that Universal Positioning System, or UPS for short...

about 7 months ago
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Supermassive Black Hole At the Centre of Galaxy May Be Wormhole In Disguise

ByteSlicer Re:Why it matters (293 comments)

Why would matter exiting a wormhole be more energetic? It would be less energetic.

In a blackhole matter enters, undergoes E=mc^2 and is re-emitted as conveniently detectable radiation. In a wormhole, matter potentially traverses the length and remains as matter - which means no gamma ray bursts, just whatever heat you pick up from jostling around with all the other matter that might be doing it.

The gamma ray burst energy doesn't come from matter to energy conversion. Recent studies found they consist of normal matter (atomic nuclei). This gets accelerated to near light speed by conservation of momentum in the accretion disc, and the frame dragging effects of the black hole geometry.

Light doesn't exit a black hole at all. Hawking radiation consists of twin pairs of photons that form just outside the event horizon (geometric energy to matter conversion). One falls into the black hole, the other escapes.

Matter falling into a black hole will gain a lot of kinetic energy from the gravitational potential alone, which counters light speed at the event horizon. And on the other side, if stuff can get out again, there can be no event horizon, so the potential well would be less steep. Classic worm holes even are theorized to have a repulsive gravity on the exit end, so matter would be accelerated even more.

about 7 months ago
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Supermassive Black Hole At the Centre of Galaxy May Be Wormhole In Disguise

ByteSlicer Re:Why it matters (293 comments)

Why should there be exits? What if they go to another universe?

I was talking about the classic kind of wormhole. Either it has a direction, and then there should be a 50/50 chance that any end is an exit, or it has no direction and both ends can act like an exit.

If they go to another universe, then I would expect other universe's wormholes to connect to ours too, in a similar ratio (otherwise our universe would be very special, and lose matter/energy).

Is there one nearby that we can observe with our extremely primitive and limited technology? Would we know it if we saw it?

Matter almost falling into a black hole, but escaping, is the source of some of the most energetic bursts of cosmic rays, and we can detect those from half a universe away. It would not be unreasonable to expect the matter/energy that comes out to be even more energetic and also have a much greater quantity. Again, only assuming stuff exits a wormhole.

about 7 months ago
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Supermassive Black Hole At the Centre of Galaxy May Be Wormhole In Disguise

ByteSlicer Re:Why it matters (293 comments)

However, there are hypotheses that wormholes to be stabilized require using negative matter

If Sag A* is a wormhole, and required stabilizing, then it would have destabilized long long time ago, since it has been constantly gobbling up regular matter (albeit infrequently lately).

I doubt anything could pass through a wormhole, since that would probably break causality or the laws of thermodynamics. Also, we should have detected stuff coming out of the other side (maybe not of this one, but there should be "exits" all over the universe).

If wormholes exist, my guess is they will be more like a pair of entangled black holes. They would look like normal black holes, until you did a careful statistical analysis of Hawking radiation of both.

about 7 months ago
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Why Disney Can't Give Us High-Def Star Wars Where Han Shoots First

ByteSlicer Obligatory (210 comments)

In Soviet Russia, Khena Solo shot first!

about 7 months ago
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Favorite Star Wars Movie?

ByteSlicer Re:Get off my effin lawn! (457 comments)

And it was the one where Han shot first!

In Soviet Russia, Khena Solo shot first!

about 7 months ago
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You Are What You're Tricked Into Eating

ByteSlicer Re:not only that (499 comments)

Indeed, it's often overlooked.
The easiest way to get plenty of B12 is by eating fortified breakfast cereals.
Depending on what you (don't) want to eat there are other, natural sources: eggs, milk/dairy, sea foods (clams, crustaceans), insects, unwashed mushrooms.

about 8 months ago
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You Are What You're Tricked Into Eating

ByteSlicer Re:not only that (499 comments)

The problem for vegetarians (and more especially for vegans) is not getting enough proteins, it's getting all of the required amino acids

What problem? Rice and beans in combination contain all the amino acids you need.

about 8 months ago
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E.T. Found In New Mexico Landfill

ByteSlicer Re:E.T Hype Fest (179 comments)

She was also the girl Elliot kissed during the drunk/frog scene in ET.

about 8 months ago
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OpenSSL Cleanup: Hundreds of Commits In a Week

ByteSlicer Re:The commits are funny into themselves. (379 comments)

Yup, that happens. Preview is your friend.
It's actually the HTML tag support that does this.
You can either use entities &lt; (--i <= 0) or wrap everything between <ecode> tags (no entities needed, but it quotes the wrapped text).

--i <= 0

about 8 months ago
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OpenSSL Cleanup: Hundreds of Commits In a Week

ByteSlicer Re:The commits are funny into themselves. (379 comments)

Indeed, and you might want to take it even one step further, and test for --i = 0.

Which would set i to 0...

about 8 months ago
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Fruit Flies, Fighter Jets Use Similar Evasive Tactics When Attacked

ByteSlicer Re:Anyone (65 comments)

Still, we're lucky they aren't carrying any Stingers.

about 8 months ago

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