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Here's a new idea about the evolutionary development of wings:
There is also the modern-day lizard that runs upright on its two hind legs. As it does that, it holds its front legs sideways, spreading out a large flap of skin between each front leg and its body. I think it does that only when frightened, and the tactic may serve to scare the creature that frightens it. I don't remember the name of the lizard or where it's from, but most people have seen videos of its comical appearance when running like that. Can anyone give a lead to a site giving information about this lizard, including its taxonomic name? – GlowWorm. —Preceding unsigned comment added by 98.17.33.139 ( talk) 14:21, 5 April 2009 (UTC)
Further information on biological wings is given in the Wikipedia articles Flying Fish and Flying and Gliding Animals. These articles provide arguments against creationists who refer to wings to support their views. – GlowWorm. —Preceding unsigned comment added by 98.17.33.139 ( talk) 14:54, 5 April 2009 (UTC)
Atherosclerosis can be caused by smoking, but a person with Atherosclerosis might not necessarily be a smoker. Am I right? Thanks. —Preceding unsigned comment added by 116.71.32.237 ( talk) 09:31, 5 April 2009 (UTC)
On average, at what age does puberty stop and at what age does growth and physical developemnt peak. Are there significant physical changes between the ages of 16 and 18, 18 and 21? Clover345 ( talk) 12:18, 5 April 2009 (UTC)
I got into an interesting discussion tonight over dinner with a fellow here in China about which foods are endemic to which areas.
With respect to the Americas I know of corn, peanuts, tomatoes, "wild" rice, sunflowers, and peppers. I'm sure there are more, however, and am having trouble finding a scholarly listing.
Can anyone help me out? —Preceding unsigned comment added by 61.189.63.137 ( talk) 12:42, 5 April 2009 (UTC)
Yeah, I was intending to keep it solely to plants... 61.189.63.137 ( talk) 12:59, 5 April 2009 (UTC)
Hi. Today I have been cleaning out my shed and I have come across what seem to be some kind of droppings on a couple of boxes and also on the floor. The link below show the droppings and also some damage to some childrens floor tiles (not sure if they have been chewed). I just wondered if anybody could please verify whether these are droppings, and from what animal. Also, if anybody could verify that those tiles have been chewed, and possibly identify what has chewed them.
http://www.flickr.com/photos/37087515@N04/sets/72157616380686806/
Thanks in advance. Lonely Banana ( talk) 14:15, 5 April 2009 (UTC)
Since ice is less dense than water, and a liquid put under enough pressure becomes a solid, what happens to water when it's under enough pressure to turn to ice? Water expands when it freezes, but it can't do that here...
That's not what I'm asking though... lemme try again. The solid form of water takes up a greater volume than the liquid form, right? And when a liquid is under great enough pressure it becomes a solid, right? So what happens when water is under great enough pressure to solidify? It can't do it the same way it normally does, right? There's not enough room.
The short answer is that the statement "water expands when it freezes" only describes its behavior under normal pressures. (Likewise, the statement "liquid water is incompressible" is only an approximation.) Under high pressure water does not turn into normal ice, but forms other kinds of ice with different crystal structures that do not involve expansion.
These other kinds of ice are identified by Roman numerals, ice II, ice III, and so on up, about 10 or 15 kinds altogether. They are considered distinct phases of water just as ordinary ice and liquid water are distinct phases, and a complete phase diagram of water will show them all. (And now someone will not be able to resist mentioning ice-nine, a phase of water that exists only in fiction, so I'll do it first. Follow the link to read about that.)
--Anonymous, 19:59 UTC, April 5, 2009.
I was reading about Orca where it says some captive specimens had learnt to regurgitate fish to attract sea gulls which they could then eat. I was wondering how animals get around all the side effects that characterise Bulimia (hypokalaemia, hyponatraemia, oesophageal damage etc) when they induce vomitting, question can be expanded to birds land mammals that feed their young in this way. MedicRoo ( talk) 17:48, 5 April 2009 (UTC)
Time for a question of my own. My family recently had the bathroom redone, and now we have a white tub in the place of our previous blue-colored porcelain one. Since then, I have seen something I've never seen before: our water has a decidedly blue tint to it. We have a well and live near the top of a hill away from any farms, so I doubt its any sort of additive or contamination. My question is this: what sort of mineral/chemical in ground water (or possibly our pipes?) could cause a blue tint in water?- Running On Brains 19:23, 5 April 2009 (UTC)
Do light bulbs use up more energy during activiation (er...when you switch them on) than they do during normal running? My mother insists I leave lights on all around the house because "it takes more energy to turn them back on".
Also, this bit's more for curiosity - what does this apply to? I know blast furnaces need to be left on all the time because it takes a lot of energy to re-start them. What abut cars? Computers? My Wii? 90.195.179.144 ( talk) 19:38, 5 April 2009 (UTC)
Are they really dangerous, like I was told as a child? 90.195.179.144 ( talk) 19:46, 5 April 2009 (UTC)
Hi Wikipedians:
I'm wondering if swelling AROUND the eyes (as in periorbital swelling/puffy eyes, like a blackeye without the blackness) have anything to do with type 2 diabetes.
I've looked over all the eye related complications of type 2 diabetes on the American Diabetes Association website, none of the conditions listed there seem to indicate swelling around the eyes.
This is just out of scientific curiosity and is not related to any medical issues.
Thanks.
65.95.97.197 ( talk) 19:59, 5 April 2009 (UTC)
hey all, What are the implications of 'Physalis Mottle Virus’ on water quality and human health?? Is it dangerous?? what does its presence imply for potable water consumption....? Thanks.
CAnnB ( talk) 23:07, 5 April 2009 (UTC)
Science desk | ||
---|---|---|
< April 4 | << Mar | April | May >> | April 6 > |
Welcome to the Wikipedia Science Reference Desk Archives |
---|
The page you are currently viewing is an archive page. While you can leave answers for any questions shown below, please ask new questions on one of the current reference desk pages. |
Here's a new idea about the evolutionary development of wings:
There is also the modern-day lizard that runs upright on its two hind legs. As it does that, it holds its front legs sideways, spreading out a large flap of skin between each front leg and its body. I think it does that only when frightened, and the tactic may serve to scare the creature that frightens it. I don't remember the name of the lizard or where it's from, but most people have seen videos of its comical appearance when running like that. Can anyone give a lead to a site giving information about this lizard, including its taxonomic name? – GlowWorm. —Preceding unsigned comment added by 98.17.33.139 ( talk) 14:21, 5 April 2009 (UTC)
Further information on biological wings is given in the Wikipedia articles Flying Fish and Flying and Gliding Animals. These articles provide arguments against creationists who refer to wings to support their views. – GlowWorm. —Preceding unsigned comment added by 98.17.33.139 ( talk) 14:54, 5 April 2009 (UTC)
Atherosclerosis can be caused by smoking, but a person with Atherosclerosis might not necessarily be a smoker. Am I right? Thanks. —Preceding unsigned comment added by 116.71.32.237 ( talk) 09:31, 5 April 2009 (UTC)
On average, at what age does puberty stop and at what age does growth and physical developemnt peak. Are there significant physical changes between the ages of 16 and 18, 18 and 21? Clover345 ( talk) 12:18, 5 April 2009 (UTC)
I got into an interesting discussion tonight over dinner with a fellow here in China about which foods are endemic to which areas.
With respect to the Americas I know of corn, peanuts, tomatoes, "wild" rice, sunflowers, and peppers. I'm sure there are more, however, and am having trouble finding a scholarly listing.
Can anyone help me out? —Preceding unsigned comment added by 61.189.63.137 ( talk) 12:42, 5 April 2009 (UTC)
Yeah, I was intending to keep it solely to plants... 61.189.63.137 ( talk) 12:59, 5 April 2009 (UTC)
Hi. Today I have been cleaning out my shed and I have come across what seem to be some kind of droppings on a couple of boxes and also on the floor. The link below show the droppings and also some damage to some childrens floor tiles (not sure if they have been chewed). I just wondered if anybody could please verify whether these are droppings, and from what animal. Also, if anybody could verify that those tiles have been chewed, and possibly identify what has chewed them.
http://www.flickr.com/photos/37087515@N04/sets/72157616380686806/
Thanks in advance. Lonely Banana ( talk) 14:15, 5 April 2009 (UTC)
Since ice is less dense than water, and a liquid put under enough pressure becomes a solid, what happens to water when it's under enough pressure to turn to ice? Water expands when it freezes, but it can't do that here...
That's not what I'm asking though... lemme try again. The solid form of water takes up a greater volume than the liquid form, right? And when a liquid is under great enough pressure it becomes a solid, right? So what happens when water is under great enough pressure to solidify? It can't do it the same way it normally does, right? There's not enough room.
The short answer is that the statement "water expands when it freezes" only describes its behavior under normal pressures. (Likewise, the statement "liquid water is incompressible" is only an approximation.) Under high pressure water does not turn into normal ice, but forms other kinds of ice with different crystal structures that do not involve expansion.
These other kinds of ice are identified by Roman numerals, ice II, ice III, and so on up, about 10 or 15 kinds altogether. They are considered distinct phases of water just as ordinary ice and liquid water are distinct phases, and a complete phase diagram of water will show them all. (And now someone will not be able to resist mentioning ice-nine, a phase of water that exists only in fiction, so I'll do it first. Follow the link to read about that.)
--Anonymous, 19:59 UTC, April 5, 2009.
I was reading about Orca where it says some captive specimens had learnt to regurgitate fish to attract sea gulls which they could then eat. I was wondering how animals get around all the side effects that characterise Bulimia (hypokalaemia, hyponatraemia, oesophageal damage etc) when they induce vomitting, question can be expanded to birds land mammals that feed their young in this way. MedicRoo ( talk) 17:48, 5 April 2009 (UTC)
Time for a question of my own. My family recently had the bathroom redone, and now we have a white tub in the place of our previous blue-colored porcelain one. Since then, I have seen something I've never seen before: our water has a decidedly blue tint to it. We have a well and live near the top of a hill away from any farms, so I doubt its any sort of additive or contamination. My question is this: what sort of mineral/chemical in ground water (or possibly our pipes?) could cause a blue tint in water?- Running On Brains 19:23, 5 April 2009 (UTC)
Do light bulbs use up more energy during activiation (er...when you switch them on) than they do during normal running? My mother insists I leave lights on all around the house because "it takes more energy to turn them back on".
Also, this bit's more for curiosity - what does this apply to? I know blast furnaces need to be left on all the time because it takes a lot of energy to re-start them. What abut cars? Computers? My Wii? 90.195.179.144 ( talk) 19:38, 5 April 2009 (UTC)
Are they really dangerous, like I was told as a child? 90.195.179.144 ( talk) 19:46, 5 April 2009 (UTC)
Hi Wikipedians:
I'm wondering if swelling AROUND the eyes (as in periorbital swelling/puffy eyes, like a blackeye without the blackness) have anything to do with type 2 diabetes.
I've looked over all the eye related complications of type 2 diabetes on the American Diabetes Association website, none of the conditions listed there seem to indicate swelling around the eyes.
This is just out of scientific curiosity and is not related to any medical issues.
Thanks.
65.95.97.197 ( talk) 19:59, 5 April 2009 (UTC)
hey all, What are the implications of 'Physalis Mottle Virus’ on water quality and human health?? Is it dangerous?? what does its presence imply for potable water consumption....? Thanks.
CAnnB ( talk) 23:07, 5 April 2009 (UTC)