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johannessimon81

Weather patterns on Exoplanet detected - 1 views

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    so it took us 70% of the time Earth is in the habitable zone to develop, would this be normal or could it be much faster? In other words, would all forms of life that started on a planet that originated at a 'similar' point in time like us, be equally far developed?
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    That is actually quite tricky to estimate rly. If for no other reason than the fact that all of the mass extinctions we had over the Earth's history basically reset the evolutionary clock. Assuming 2 Earths identical in every way but one did not have the dinosaur wipe-out impact, that would've given non-impact Earth 60million years to evolve a potential dinosaur intelligent super race.
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    The opposite might be true - or might not be ;-). Since usually the rate of evolution increases after major extinction events the chance is higher to produce 'intelligent' organisms if these events happen quite frequently. Usually the time of rapid evolution is only a few million years - so Earth is going quite slow. Certainly extinction events don't reset the evolutionary clock - if they would never have happened Earth gene pool would probably be quite primitive. By the way: dinosaurs were a quite diverse group and large dinosaurs might well have had cognitive abilities that come close to whales or primates - the difference to us might be that we have hands to manipulate our environment and vocal cords to communicate in very diverse ways. Modern dinosaur (descendents), i.e. birds, contain some very intelligent species - especially with respect to their body size and weight.
johannessimon81

Listen to a Volcano Scream Just Before It Erupts - 0 views

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    It actually does make a very weird sound...
Thijs Versloot

Laser fusion reactor inches closer to ignition #NIF - 2 views

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    a point called plasma/fuel break-even is reached where the energy released is higher than the power absorbed by the pellet. Of course, to produce 192 high power lasers does also have an efficiency. Thats why 'machine break-even' or even 'grid break-even' is more important and still quite a long way off. It does show that laser fusion is catching up quickly, although with serious bumps along the road.
Marcus Maertens

World's Roundest Object! - YouTube - 0 views

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    Why building a monocrystaline silicone sphere for over 1 Million Euros? Because we need a new definition of the kilogram! ;)
johannessimon81

Self-assembling (?) DNA nano-"robot" - 0 views

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    Scientists inch closer to building a drug-delivering nanorobot
Paul N

Quantum gas goes below absolute zero - 4 views

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    Quite intriguing!
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    this is fantastic! If built, such systems would behave in strange ways, says Achim Rosch, a theoretical physicist at the University of Cologne in Germany, who proposed the technique used by Schneider and his team3. For instance, Rosch and his colleagues have calculated that whereas clouds of atoms would normally be pulled downwards by gravity, if part of the cloud is at a negative absolute temperature, some atoms will move upwards, apparently defying gravity4. Another peculiarity of the sub-absolute-zero gas is that it mimics 'dark energy', the mysterious force that pushes the Universe to expand at an ever-faster rate against the inward pull of gravity. Schneider notes that the attractive atoms in the gas produced by the team also want to collapse inwards, but do not because the negative absolute temperature stabilises them. "It's interesting that this weird feature pops up in the Universe and also in the lab," he says. "This may be something that cosmologists should look at more closely."
jmlloren

Why starting from differential equations for computational physics? - 1 views

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    "The computational methods currently used in physics are based on the discretization of differential equations. This is because the computer can only perform algebraic operations. The purpose of this paper is to critically review this practice, showing how to obtain a purely algebraic formulation of physical laws starting directly from experimental measurements."
johannessimon81

Water found on exoplanets - 1 views

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    A few years ago we did not even know if there was any planets outside the solar system. Now we know some of the stuff that happens on them. Wonder how long it takes until we discover life somewhere else!
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    I do not know what is yetto come, but I am looking forward to the "starshade" Sara Seager's team wants to couple to a telescope: "The star shade and the telescope have to be aligned perfectly at 125,000 miles away. Once aligned, the system will observe a distant star, and then move to another distant star and re-align. This is technologically speaking, unchartered territory." http://www.youtube.com/watch?feature=player_embedded&v=G68sqgRhP2E
Thijs Versloot

TED-Education: Lessons Worth Sharing - 1 views

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    For your daily intake of interesting thoughts...
Beniamino Abis

Wanted: Volunteers for Yearlong Mock Mars Mission in Canadian Arctic - 2 views

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    Mars Society, which advocates for manned exploration of the Red Planet, has released its requirements for the six volunteers who will be expected to spend 12 months at the society's Flashline Mars Arctic Research Station on Canada's Devon Island, which is about 1,450 kilometers from the North Pole, beginning in July 2014. Crewmembers will spend most of their time doing science, studying things such as carbon release from the permafrost and human performance in extreme conditions. If they want to go outside their base, they'll have to wear a spacesuit. If something breaks, they're the ones who are going to have to fix it.
johannessimon81

Soylent - 3 views

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    Editor of Wired describes his experience
LeopoldS

Brown Recluse Spider's Silk Is Strong and Really Strange - Wired Science - 0 views

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    Fascinating! New type of spider silk?
Nicholas Lan

amines found to be far more important than cosmic rays in cloud formation - 0 views

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    relationship between living organisms and cloud formation seems interesting
Tom Gheysens

Revolutionizing solar energy: Quantum waves found at the heart of organic solar cells - 1 views

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    pretty interesting! I am still convinced we can do something in this :)
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    There surely must be possibilities indeed, maybe we should expand it to an RF? By coincidence, I bumped into a quantum optics PhD looking for a post-doc, who would love to give a talk in the team on his research (although very different topic) and I invited him for early January.
LeopoldS

A Formula for Happiness - NYTimes.com - 1 views

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    beati pauperes spiritu :-) "Political junkies might be interested to learn that conservative women are particularly blissful: about 40 percent say they are very happy. That makes them slightly happier than conservative men and significantly happier than liberal women. The unhappiest of all are liberal men; only about a fifth consider themselves very happy." I think that there are many factors missing there that are just not asked possibly such as altruism as a source for happiness ...
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    According to The Beatles "Happiness is a warm gun"... To each his own, I guess. :-)
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    It really depends on one's values really. If your values don't follow the standard vanilla flavor then it all breaks down.
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