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Darkflame 2009-08-22 20:40

magnetic poles flipping. It happens every one in awhile.
When the magnetic poles last flipped was probably around 800,000 years ago, well within human history, but before civilization was advanced enough to record much about it.
It happened a few times earlier then that too, still with plenty of homosapaniens about.
So whatever its impact, its not an extinction event, although the period while its flipping probably does make us more vulnerable to certain stela activity.

Ergo, its probably not a good idea sunbathing as there will probably be an even higher chance of skincancer.

ChaosFish 2009-08-22 22:46

Wait, does that mean compasses will start pointing south now?

Darkflame 2009-08-22 23:18

yup

ChaosFish 2009-08-23 02:12

Omg for reals?!

That'd be so cool! So when does it happen?

ChaosFish 2009-08-23 02:56

Found this on the web:
Quote:

2012 is when something will happen that only happens every few hundred million years: the earth's magnetic poles will shift. yup, that's right, compasses will start pointing south and a lot of electronic equipment will be screwed up.
(source: here)

Can anyone confirm?

Jasiek 2009-08-23 05:14

Quote:

Originally Posted by Darkflame (Post 386015)
Fucked up, but it isn't that bad, our species survived it before.
We just gota stop using compass's for critical stuff in our tech.

I don't actually think gps broadcasts (ie, timed radio) will be effected. Although, that doesn't give you direction.

Quote:

Originally Posted by Darkflame (Post 386032)
magnetic poles flipping. It happens every one in awhile.
When the magnetic poles last flipped was probably around 800,000 years ago, well within human history, but before civilization was advanced enough to record much about it.
It happened a few times earlier then that too, still with plenty of homo sapiens about.
So whatever its impact, its not an extinction event, although the period while its flipping probably does make us more vulnerable to certain stellar activity.

Ergo, its probably not a good idea sunbathing as there will probably be an even higher chance of skin cancer.


WRONG! the biggest estimates say that homo sapiens first started appearing 200 000 years ago. The most proof based ones say tell us of 120 - 150 000 years.

Also, the lack of a magnetic field would mean first that the solar wind be free to send some part of the atmosphere into space. Also, the amount of radiation received outside would be lethal, to not get ill from t you'd have to sit in shielded buildings.

However, if the magnetic field doesn't disappear entirely, we might "just" get off with a lot higher risks of skin cancer. And there will be major ecological trouble, with plants and animals dying out.

The magnetic shield is what's making life possible. If it goes away, earth becomes mars.

ChaosFish 2009-08-23 05:15

Ok so does life end in 2012 or doesn't it?

Jasiek 2009-08-23 05:24

Unlikely.

ChaosFish 2009-08-23 05:53

Ok good. Because I want to be alive for when compasses start pointing south, it'd be so freaking awesome :D

Darkflame 2009-08-23 12:17

Well, its more the in-between time where they start pointing all over the place. Thats "interesting".

Quote:

Originally Posted by Jasiek (Post 386051)
WRONG! the biggest estimates say that homo sapiens first started appearing 200 000 years ago. The most proof based ones say tell us of 120 - 150 000 years.

meh, ok, Mr Pedantic :P
The homo genius or whatnot then.
We arnt that different.

Quote:

Because the magnetic field has never been observed to reverse by humans with instrumentation, and the mechanism of field generation is not well understood, it is difficult to say what the characteristics of the magnetic field might be leading up to such a reversal. Some speculate that a greatly diminished magnetic field during a reversal period will expose the surface of the earth to a substantial and potentially damaging increase in cosmic radiation. However, Homo erectus and their ancestors certainly survived many previous reversals. There is no uncontested evidence that a magnetic field reversal has ever caused any biological extinctions. A possible explanation is that the solar wind may induce a sufficient magnetic field in the Earth's ionosphere to shield the surface from energetic particles even in the absence of the Earth's normal magnetic field.[8]

Also, mass extinctions simply don't seem to align to magnetic pole reversals, so whatever happens, it dosnt significantly interfere with life.

Jasiek 2009-08-23 15:57

Well, it's not about interfering with life, or even extinction, because as you pointed out pole reversals don't coincide with mass extinction.

However, all you need for big trouble for us if some of the solar wind gets through and ionizes the power lines. With a busted electricity supply system, humanity would get pushed into a dark age for months if not years. the giant transformers at switching stations take months to build, and no country on earth has enough backups.

Also, satellites in LEO (low earth orbit) may not be properly shielded for the event.
There is no proof for saying that humanity would die out, however our civilisation is in such a delicate state right now, that an event like that might ruin everything that has been built so far. Or significantly hinder it.

Jasiek 2009-08-23 20:56

Mars Science Laboratory is freakin' awesome.
http://www.youtube.com/watch?v=UyM1bgKWzng&fmt=
Destined to get to Mars in 2011

It's a huge rover armed with a laser capable of shooting rocks and using it's spectrometer to detect their composition from the thus generated cloud of plasma!!

here's a photo of this awesome monstrosity with chairs for comparison:
http://upload.wikimedia.org/wikipedi...ty_chassis.jpg

3 meters long, weighing 900kilograms. It will be powered by rtg's that will provide up to 80years of electricity. These rtg's will generate 2.5 kWh per day, and 140 watts.

Here's a photo comparing the sizes of martian rovers so far, the smalles one is sojourner, measuring 65cm:
http://upload.wikimedia.org/wikipedi...omparison_.jpg
http://upload.wikimedia.org/wikipedi...ver-metric.jpg

Echomote 2009-08-23 22:25

From Universe to Multiverse. Are You Ready? (Dr. Michio Kaku)
http://digg.com/d311dsS
YouTube Video

Thought I'd share.

ChaosFish 2009-08-23 23:27

Quote:

Originally Posted by Echomote (Post 386073)
From Universe to Multiverse. Are You Ready? (Dr. Michio Kaku)
http://digg.com/d311dsS
YouTube Video

Thought I'd share.

Stopped watching as soon as they started talking about god and religion. But until then it was interesting :) New big bangs within our own 3 dimensions?

Jasiek 2009-08-23 23:49

They did?
Where?! He only humoured that dude, by speaking to him with a language he'd understand.
It's weird to me that people actually have theological issues over science. Stupid mediaeval mumbling.

ChaosFish 2009-08-24 01:31

Well I did say "as soon". As in, on the second. Maybe I should give it another chance :p

Darkflame 2009-08-24 16:37

wow, I'm getting behind on the videos/info here, got so much to catch up on.
I've been busy reading a load more AR related things. I posted some of my own ideas in a paper, and been busy replying to folks. (some from the AR consortium others from Layer and other related companys....thankfully, everyone seems to be keen for an open-standard).

I also got invited by someone to try out Google Wave, so I've been busy playing about with some high-tech of my own :)
Wave is very buggy at the moment. I can see it being fundamentaly a massive step for online communications, and very usefull for augmented reality as well as countless other things....but at the moment its no where near as slick as gmail, and they might have a hard time saleing it to the public untill it is. Still, hopefully I'll have some time to get really stuck in.
----------

Anyway ways....I really wanted to post this;

http://www.hizook.com/blog/2009/08/0...l-manipulation

Amazing robot hand thing.
Very very fast and precise.

Darkflame 2009-08-24 16:51

Quote:

Originally Posted by Jasiek (Post 386072)
Mars Science Laboratory is freakin' awesome.
http://www.youtube.com/watch?v=UyM1bgKWzng&fmt=
Destined to get to Mars in 2011

It's a huge rover armed with a laser capable of shooting rocks and using it's spectrometer to detect their composition from the thus generated cloud of plasma!!

here's a photo of this awesome monstrosity with chairs for comparison:
http://upload.wikimedia.org/wikipedi...ty_chassis.jpg

3 meters long, weighing 900kilograms. It will be powered by rtg's that will provide up to 80years of electricity. These rtg's will generate 2.5 kWh per day, and 140 watts.

Here's a photo comparing the sizes of martian rovers so far, the smalles one is sojourner, measuring 65cm:
http://upload.wikimedia.org/wikipedi...omparison_.jpg
http://upload.wikimedia.org/wikipedi...ver-metric.jpg

Cool.
And yes, that is big O_o

Darkflame 2009-08-25 11:55

Not as cool as the robot hand, but still nifty;

http://www.youtube.com/watch?v=A_3i2Q7rRpI

Expect that in shops pretty soon.

ChaosFish 2009-08-25 12:21

Quote:

Originally Posted by Darkflame (Post 386109)
Not as cool as the robot hand, but still nifty;

http://www.youtube.com/watch?v=A_3i2Q7rRpI

Expect that in shops pretty soon.

Awesome, I intend to switch all mirrors with this thing.

Darkflame 2009-08-27 15:35

Not exactly high-tech, but I like this as a social idea;
http://wave-samples-gallery.appspot....p?app_id=27014

Could work well combined with advark.

Jasiek 2009-08-28 03:44

http://www.hizook.com/blog/2009/08/0...l-manipulation

Um, wth! This robotic hand is amazing! It can open and close in 1/10th of a second! It throws a cellphone in the air and then catches it flawlessly!

I think I might be replacing my hands and eyes someday....

Darkflame 2009-08-28 12:52

Dude, I posted that a few posts up :P
And yes, its fantastic.

The camera tracking is also great.

Darkflame 2009-08-30 00:13

http://www.youtube.com/watch?v=Mp8Y2yjV4fU

O_o
Its amazing this stuff can be done with a (relatively) cheap generic parts sold as a toy.

Jasiek 2009-08-30 00:35

Wow it takes forever...

Where were mindstorms when I was a small kid though? :(
Man I want a hole box of them!


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