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Latest Activity: Oct 11

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The Denisova genome

Started by Adriana. Last reply by Tom Sarbeck Apr 23. 7 Replies

Remember the 40,000 year-old Denisova finger bone that yielded sufficient DNA to…Continue

Tags: evolution, human, genome, DNA, hominin

Do You Need The Universe To Have Had A Beginning?

Started by Tom Sarbeck. Last reply by Tom Sarbeck Nov 19, 2016. 31 Replies

Many if not all human societies have origin myths and they differ greatly.Several years ago a San Francisco-born-and-raised woman told me she is a materialist.An hour ago a woman who was raised a Jehovah Witness and has left that faith told me the…Continue

Tags: cosmology, cosmogeny, evidence, need, universe

Florida schoolgirl charged with felonies for science experiment

Started by Neal. Last reply by Chris Sep 27, 2016. 3 Replies

No science for you woman! Photo: FreeLearningLife - FlickrWednesday, May 1, 2013 -…Continue

Tags: felony, a, becomes, experiment, science

Mandating Scientific Discovery Never Works But politicians can’t seem to grasp that.

Started by Neal. Last reply by Chris Aug 31, 2016. 4 Replies

GOP decides that research should be legislated. Usual nonsense.By Lawrence Krauss|Posted Friday, June 21, 2013, at 7:30 AM…Continue

Tags: work, doesn't, research, science, mandating

Science Bits, News, Videos

Started by Adriana. Last reply by Tom Sarbeck Aug 24, 2016. 1364 Replies

This discussion is to have a recurrent thread for science news, tidbits, quick…Continue

Tags: science videos, science quick facts, science news

Tully Monster

Started by Mrs.B. Last reply by Mrs.B Mar 17, 2016. 2 Replies

Solving the mystery of the Tully MonsterPosted: 16 Mar 2016 12:13 PM PDTThe Tully…Continue

Super weeds in the US

Started by Davy. Last reply by Chris Aug 18, 2014. 1 Reply

New York (AFP) - The United States is facing an epidemic of herbicide-resistant "superweeds" that some activists and researchers are blaming on GMO's, an accusation rejected by industry giants.According to a recent study, the situation is such that…Continue

Tags: monsanto, chemical, herbicide, GMO, superweed

Platypus Godzilla.

Started by Davy. Last reply by Davy Nov 20, 2013. 5 Replies

And you thought the platypus was a nice, cuddly little monotreme. You would not have thought so 5 to 15 million years ago. Palaeontologists have uncovered the fossil of a platypus that looks as though it is on steroids.  The platypus dub the…Continue

Tags: Palaeontologists, Godzilla, platypus

Aussie algae fuel green oil hope

Started by Davy Oct 20, 2013. 0 Replies

Aussie algae fuel green oil hopeDespite the claims of some, commercially viable fuels from algae have not yet been developed. But newly trialled native algae species provide real hope, a Queensland scientist has found.Dr Evan Stephens and the team…Continue

Tags: algae, hope, bio-fuel, East, middle

Mystery moss rediscovered

Started by Davy. Last reply by Davy Oct 20, 2013. 2 Replies

News from James Cook University. Mystery moss rediscoveredA botanical puzzle more than 150 years old could soon be solved, thanks to a discovery by a second-year botany student in Queensland’s far north.James Cook University student Megan Grixti…Continue

Tags: botany, student, sorapilla, papuana, 150-years

Comment Wall

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You need to be a member of Science! to add comments!

Comment by Hope on March 18, 2011 at 10:04am

The Inner Life of the Cell

Comment by Doone on March 18, 2011 at 9:11am
Comment by Doone on March 18, 2011 at 8:18am

THE WORST CASE: WHAT IF THE WATER RAN DRY IN THE JAPANESE REACTORS?

From Science:

JapanWhat if cooling in one or more of the reactors at the Fukushima nuclear plant were lost? Richard Lester, chair of the department of nuclear science and engineering at the Massachusetts Institute of Technology (MIT) in Cambridge, emphasizes the "very, very" unlikely possibility of that scenario. But if it were to occur, the inherent heat of the radionuclides would cause the fuel in the reactors to melt. Here's what would happen next. In the event of a meltdown, the fuel could melt through and flow out of the primary pressure vessel, falling into the so-called core capture chamber which sits below the reactor for this very purpose. That vessel has water that would hopefully cool the molten fuel down, eventually ending the crisis. If this didn't happen, however, a steam explosion could blow out the primary containment vessel, spewing massive quantities of radioactive aerosols as well as particulates. With towns evacuated at a perimeter of 30 kilometers, the lethality of that release "would depend on the winds," says Lester.

How would this compare to the disaster at Chernobyl? As noted in the New Scientist:

At Chernobyl the pressure vessel was breached and the reactor had no containment. There, the core itself burned fiercely, largely because it was made of graphite - which was used as the moderator… once the reactor exploded the graphite made the situation worse, because it burned so readily. The fires carried radioactive material from the reactor core high into the atmosphere, where it spread far and wide. This could not happen at Fukushima Daiichi, as it does not use graphite as the moderator.

More here.

Comment by Doone on March 17, 2011 at 8:07pm

Which is more Important Old Genes or New Genes?  This answer is found here http://sciblogs.co.nz/southern-genes/2011/03/18/are-newly-evolved-g...

Some scientists at the University of Chicago examined the dispensability of newly evolved genes in the fruit fly Drosophila melanogaster. By comparing the genome of D. melanogaster with those of other closely related fruit flies, they identified a bunch of newly evolved genes. They then knocked down the functions of these genes one by one, and  observed the effect these knockdowns had on the flies, and whether they survived and were normal.

The somewhat surprising result was that a whopping 30% of newly evolved genes were essential for the flies’ viability. What do I mean by viability? If the genes were knocked out, the flies died.

How does this compare to ‘old’ genes? The researchers performed the same experiment using ancient genes, and found that 35% were essential. That’s not much different from 30%, suggesting that new genes are just as important as old genes for survival!

Comment by Doone on March 17, 2011 at 5:10am

Ancient 'Hyperthermals' Serve as Guide to Anticipated Climate Changes; Sudden Global Warming Events More Frequent?

ScienceDaily (Mar. 16, 2011) — Bursts of intense global warming that have lasted tens of thousands of years have taken place more frequently throughout Earth's history than previously believe, according to evidence gathered by a team led by Scripps Institution of Oceanography, UC San Diego   http://www.sciencedaily.com/releases/2011/03/110316152941.htm

Comment by Doone on March 16, 2011 at 10:05pm
This collection of AIRS images of Ireland positioned in the shape of a clover include visible (left), infrared (center) and microwave (right). They were captured from the AIRS instrument onboard NASA's Aqua satellite on March 3, 2011 and revealed a land surface temperature near 50F 
http://www.sciencedaily.com/releases/2011/03/110316171233.htm?utm_s...
Comment by Doone on March 16, 2011 at 8:32pm

MULTIVERSISM

Cover00 And once you become willing to take on the philosophical baggage of a multifoliate universe (and aren't bothered by your countless identical twins), some of the deepest and most vexing problems about physics become easy to understand. All those nonsensical-seeming quantum-mechanical laws—that a particle can be in two places at once, that two objects can have a spooky connection that appears to transcend the laws governing space and time—instantly become explicable the moment you view our universe as one among many. And from Greene's point of view, the 10⁵⁰⁰ different cosmoses described by string theory have ceased to be an unwanted artifact of the theory's equations, instead becoming a factual description of universes that actually exist. Each of these universes is a bubble cosmos with its own cosmological constants, and as he says, "with some 10⁵⁰⁰ possibilities awaiting exploration, the consensus is that our universe has a home somewhere in the landscape." Which is to say, string theory can no longer be accused of describing a landscape of fictional universes; our universe is just one in a collection of cosmoses as real as our own, even if we're unable to see them. Multiversism is a radical, ambitious, and frustrating argument that relies on many lines of evidence and modes of thought—cosmological reasoning about the nature of the big bang, quantum-mechanical reasoning about the nature of matter on the smallest scale, information-theoretic reasoning about the nature of black holes—and it can be bewildering. Furthermore, Greene argues for nine distinct varieties of multiverse, each of which approaches the issue from a slightly different direction. And since the majority of his readers are untutored in the mathematical formalism that physicists use to understand the underpinnings of a scientific theory, Greene must use the much less precise tools of metaphor and simile to do the intellectual heavy lifting.
more from Charles Seife at Bookforum here.
http://www.3quarksdaily.com/3quarksdaily/2011/03/multiversism.html
Comment by Adriana on March 16, 2011 at 3:09pm
You guys may be interested in this discussion I posted in the main Forum: Homophobia an adaptive trait?
Comment by Doone on March 16, 2011 at 10:59am

The Economics Of Nuclear Power

NuclearPower

Robert Bryce isn't expecting a nuclear power revival in America - and not because of Japan:

[T]he forces that already undermined the revival of America’s nuclear sector are largely economic, not political. The most formidable obstacle: the ongoing shale gas revolution.

Comment by Adriana on March 16, 2011 at 9:42am
Older matriarch elephants are wiser and recognize the threat of a lion by the type of growl. Read all about it in this discussion I posted in the Animal Vegetable Mineral group
 
 
 

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