Score
Title
382
AskScience Panel of Scientists XVII
7363
I’ve read that when caterpillars are in their cocoons, they dissolve completely into goo; no original parts survive in the butterfly. How is the butterfly made from the goo? Is there an embryo that grows and uses the goo like a yolk sac? Or does the goo somehow arrange itself into new body parts?
104
How sustainable is our landfill trash disposal model in the US? What's the latest in trash tech?
16392
With all this fuss about net neutrality, exactly how much are we relying on America for our regular global use of the internet?
54
If tooth decay is just caused by the bacteria feeding and producing acid, would a person that just used listerine have the same dental health as a person that brushed without flossing?
16
Does boiling water in a low pressure atmosphere still kill pathogens?
16
My doctor says that chemotherapy works by specifically targeting rapidly-dividing cells, which is how it works to fight cancer and also why it has the side effects that it does. But how does it “know” which cells are rapidly dividing? And how rapidly is “rapidly”?
8
How mixable are different types of plastic? Like PET and HDPE?
15
How are isotopes used in nuclear physics Experiments isolated?
848
In 1996 NASA announced 'evidence of primitive life on early Mars'. In 2000, a second report supported the thesis. What happened next?
3
How are the needles for Atomic Force Microscopes made, and how can the tip be smaller than the atoms they are manipulating? What are their limitations?
8
How are the triple(or more) parachutes commonly seen on capsules returning from space kept apart?
3
What makes a laser shine in a straight line?
82819
Help us fight for net neutrality!
1
How do scientists determine the weight of huge (extinct) animals?
2
what's the difference between ZW and XY chromosomes, how did they evolve, and why are ZW organisms homogametic for males where XY organisms are heterogametic?
4
What's the current state of AIDS? Is it still basically a death sentence, or is it manageable? What are the consequences of getting AIDS nowadays?
1
What happened to the Global Cooling scare of the 1980's?
0
If a pipe was run from space straight into the ocean would water run up it and flow into space?
2
Can animals understand human body language like laughing or smiling?
2
Lithium batteries are being developed to power cars in response to the decline in fossil fuels, but will lithium eventually run out as well?
1
Question from my 4 year old sister, do other animals also get "Boogers"?
1
Is there any short-term geothermal or atmospheric effect that is caused by the sun heating one "side" of the earth at a time?
14
Could an electric vehicle stand a chance in a racing event?
23
If there is an ocean below the ice surface of Europa, is the ice shell buoyant? Geologically supported? Or is it kept in place by the distribution of gravity?
1
Is there a mathematical relationship between Moire patterns, Chladni plate vibration patterns, and the pattern formed by rings when making different cuts from wood?
2
Would readers of character based languages (e.g Chinese) experience dyslexia differently since they don't use strings of letters?
3
How to calculate eigenvalues in the Kirchhoff's thin plate model?
27
Do all individual atoms in a solid emanate their own blackbody radiation?
14
Is there anywhere other than Earth in the Solar system where you could see a total solar eclipse and/or total lunar eclipse equivalent?
4
How did we get solid matter from light? How did Photons and Electrons create solid matter in the early ages of the universe when everything was insanely hot?
3
Since the event at CERN that proved the existence of Higgs bosons/Higgs field, can we now see this event happen regularly now we know ‘where’ to look?
8
Why does turning on an electric blender in the kitchen cause my HD antenna signal to go out in a different room?
6
Can the human body survive breathing pure oxygen at lower pressures?
14
When beryllium-16 decays and produces 2 neutrons simultaneously, what happens to that dineutron?
6
How do we know the earth’s core is super hot and why is it so?
1
How does the pressure of the vacuum of space affect the ISS?
11184
From my kid: Can you put a marshmallow on a stick out into space and roast it with the sun?
3
Given that cerebrospinal fluid flows around the structures of the brain, would messenger chemicals from synaptic activity in one area be passed to, and alter synaptic activity in other regions of the brain?
9
How do we know what the tonsil does?
2
In a compound with an alkene and an alkyne, which would ozone cleave in an oxidative cleavage reaction?
305 contact_fusion Last month they did publish an [erratum](http://science.sciencemag.org/content/357/6352/eaao5843) to the original [Science](http://science.sciencemag.org/content/355/6326/715) article detailing the findings. They claim their conclusions stand. I'm sure that several groups are working to replicate the work and that it is under some intense scrutiny. Especially in a field like this, where there are a handful of groups with the necessary expertise to replicate the work, it can take a while. As I understand it, just replicating it is a feat on the order of the original discovery.
245 Astromike23 Even without experimental proof, we know about as well as we possibly can that metallic hydrogen does exist without the need for lab results. By mass, Jupiter is *mostly* liquid metallic hydrogen. We still haven't seen it directly, but literally no other substance could fit the bill for such low density to fit the planet's mass, yet high conductivity to fit the planet's enormous magnetic field. Don't get me wrong - lab results are still important, because while tons of computer simulations predict the properties of metallic hydrogen, there are probably still a few surprises about the material waiting for us. Nonetheless, even if this study is debunked, gas giants provide ample evidence that metallic hydrogen does exist. **EDIT** to add some background: To be clear, researchers have been claiming metallic hydrogen in the lab for over 20 years now, usually creating it for a split-second with some kind of implosion. Citations start with [Weir, et al (1996)](http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.76.1860), conductivities were measured by [Ternovoi, et al (1999)](http://www.sciencedirect.com/science/article/pii/S0921452698013039), deuterium was made metallic by [Celliers, et al (2000)](http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.84.5564), claims of *atomic* metallic hydrogen were made by [Badiei, Holmlid (2004)](http://iopscience.iop.org/article/10.1088/0953-8984/16/39/034/meta), and so on. What's so different about this detection is that it's the first claim of *solid* metallic hydrogen, which is difficult since it must be at high enough pressure to be metallic, but also cold enough to be solid.
35 sweedeh So the scientists who discovered that hydrogen may have a metallic phase using incredibly high pressure. They conducted to test to determine if the hydrogen had become metallic and more importantly superconducting. The first was a laser shinning through the sample which was block when the hydrogen went from clear solid to the metallic phase and they attempted to pass a current through it. This gave an inconclusive result as to whether the material had become metallic or superconducting. I don't believe they have published anything more on the discovery so other than what's in the original paper nothing more is known
6 [deleted] [removed]
302 0 contact_fusion Last month they did publish an [erratum](http://science.sciencemag.org/content/357/6352/eaao5843) to the original [Science](http://science.sciencemag.org/content/355/6326/715) article detailing the findings. They claim their conclusions stand. I'm sure that several groups are working to replicate the work and that it is under some intense scrutiny. Especially in a field like this, where there are a handful of groups with the necessary expertise to replicate the work, it can take a while. As I understand it, just replicating it is a feat on the order of the original discovery.
244 0 Astromike23 Even without experimental proof, we know about as well as we possibly can that metallic hydrogen does exist without the need for lab results. By mass, Jupiter is *mostly* liquid metallic hydrogen. We still haven't seen it directly, but literally no other substance could fit the bill for such low density to fit the planet's mass, yet high conductivity to fit the planet's enormous magnetic field. Don't get me wrong - lab results are still important, because while tons of computer simulations predict the properties of metallic hydrogen, there are probably still a few surprises about the material waiting for us. Nonetheless, even if this study is debunked, gas giants provide ample evidence that metallic hydrogen does exist. **EDIT** to add some background: To be clear, researchers have been claiming metallic hydrogen in the lab for over 20 years now, usually creating it for a split-second with some kind of implosion. Citations start with [Weir, et al (1996)](http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.76.1860), conductivities were measured by [Ternovoi, et al (1999)](http://www.sciencedirect.com/science/article/pii/S0921452698013039), deuterium was made metallic by [Celliers, et al (2000)](http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.84.5564), claims of *atomic* metallic hydrogen were made by [Badiei, Holmlid (2004)](http://iopscience.iop.org/article/10.1088/0953-8984/16/39/034/meta), and so on. What's so different about this detection is that it's the first claim of *solid* metallic hydrogen, which is difficult since it must be at high enough pressure to be metallic, but also cold enough to be solid.
38 0 sweedeh So the scientists who discovered that hydrogen may have a metallic phase using incredibly high pressure. They conducted to test to determine if the hydrogen had become metallic and more importantly superconducting. The first was a laser shinning through the sample which was block when the hydrogen went from clear solid to the metallic phase and they attempted to pass a current through it. This gave an inconclusive result as to whether the material had become metallic or superconducting. I don't believe they have published anything more on the discovery so other than what's in the original paper nothing more is known
5 0 [deleted] [removed]