What animal produces the most-developed offspring, that is closest to their adult form at birth in terms of size, proportions, and abilities? | AskScience Blog

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Saturday, April 2, 2016

What animal produces the most-developed offspring, that is closest to their adult form at birth in terms of size, proportions, and abilities?

What animal produces the most-developed offspring, that is closest to their adult form at birth in terms of size, proportions, and abilities?


What animal produces the most-developed offspring, that is closest to their adult form at birth in terms of size, proportions, and abilities?

Posted: 01 Apr 2016 09:59 PM PDT

  • I know there are broad classes of animals that give birth to relatively mature, self-sufficient offspring. My question is which species produces the most mature, closest-to-adulthood offspring of them all.
  • Offspring that start pretty unlike adults, but mature quickly don't count. I'm asking about their state at birth (so not "X species of rodent has young that are blind, hairless, and helpless but they're fully grown three-weeks later.")
  • Offspring that are born similar to adults, but just much smaller also aren't quite what I'm getting at. I'm asking what animal has young that are well-developed in terms of form and capabilities, but also born closest to adult size (so not "X species of squid has young that are miniature, fully-capable versions of the adults, but they're 1/1000th the size and won't be fully grown for another ten years.")
submitted by /u/translucent
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Whenever I buy a lottery ticket I remind myself that 01-02-03-04-05-06 is just as likely to win as any other combination. But I can't bring myself to pick such a set of numbers as my mind just won't accept the fact that results will ever be so ordered. What is the science behind this misconception?

Posted: 01 Apr 2016 05:53 AM PDT

Would the amount of sand affect the speed of a water wave?

Posted: 02 Apr 2016 04:16 AM PDT

Hello.

So I kind of get that changing the medium would change the speed of the save. However, does changing the amount of sand at the bottom of the water change it whatsoever then? Would the sand be part of the medium, or would it change the medium by altering the water depth etc.?

Thanks!!

submitted by /u/NAMukato
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What is the quantum explanation for the absorption of light by matter?

Posted: 01 Apr 2016 07:15 AM PDT

I do spectroscopy for a living and am trying to better understand the fundamentals of the systems I study. I understand that the position of an electron can be described as a standing wave. I understand Maxwell's equations (well, I have a working knowledge), and I think I understand that the E field of an EM wave will apply a force to the electron causing a shift in the distribution function. How could you formally show this interaction and resulting absorption/coupling for a simple light-matter interaction in quantum terms?

submitted by /u/ouemt
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Is there a safe, available set of liquids that would be luminescent after being combined, but not before?

Posted: 01 Apr 2016 08:06 AM PDT

I hope that today is not the wrong day to ask. I understand that it is April 1st, however I'm trying to find out for my wedding ceremony.

The desired result would be in a unity ceremony, my fiance and I pour two liquids (not glowing) from our containers into a third, larger container, and that liquid begins to glow after. We are getting married at midnight on a full moon night in September on the water. And we thought that the glow would be a nice touch.

Ideally it would be phosphorescent or fluorescent afterwards. But the luminescent property is more important.

We were told that we would be able to take apart glow sticks and dilute the parts in ethyl acetate, but I'm not sure how that would work, since part of a glow stick is a solid substance that is broken.

Thank you for your help.

submitted by /u/soberdude
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Why is it so easy for us to remember and describe images and sounds but so difficult to retain smells and scents?

Posted: 01 Apr 2016 08:40 PM PDT

For example I was walking through an area of my local park and caught a wiff off something. I instantly remembered the smell (though I wasn't sure what it was) and then couldn't remember or mentally recreate the smell when I left that area.

submitted by /u/Imtherealwaffle
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Map projections have freely accessible equations that govern how the globe is portrayed two dimensionally. Earth isn't spherical, it is an oblong spheroid. Do those equations account for that? And can they be applied to other celestial objects of different shapes?

Posted: 02 Apr 2016 06:10 AM PDT

Is it possible to build a radio laser?

Posted: 01 Apr 2016 08:17 PM PDT

It would be surprising to me if it's not physically possible since I assume the basic principles would also apply to the radio spectrum. So if it is possible, how/why do longer wavelengths make a radio laser impractical?

submitted by /u/MauiHawk
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[Math] [Psychology] Are there any studies about our intuitions of math?

Posted: 01 Apr 2016 07:50 AM PDT

I'm wondering in particular about the differences in these phrases:

Increased by 50% vs 50% more

Increased by 150% vs 150% more

Increased to 150% vs 150% of

Decreased by 50% vs decreased to 50% vs decreased by 150%

5x faster vs 5x as fast

I've just noticed that I tend to have to clarify with most people what precisely they mean mathematically when they use these terms.

submitted by /u/Scraendor
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How is the force of a magnetic field related to the distance between two permanent magnets, a permanent magnet and a paramagnet, and a permanent magnet and a steel plate?

Posted: 01 Apr 2016 06:41 AM PDT

In the case of aligned North to South poles, it would seem that the force should go as the 4th power (inverse square for each magnet) - yet it seems to go as the 3rd power of the distance.

Is the case very much different for paramagnetic materials (particles) or iron plates?

submitted by /u/Secret_Testing
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Couldn't there be a theoretical cap to entropy in a system?

Posted: 02 Apr 2016 07:37 AM PDT

I'm a humanities major, so take it easy on me here... but, according to the Laws of Thermodynamics, if entropy approaches a constant value as we get closer to absolute zero (which we've never reached, if I am correct--but gotten terribly close), then wouldn't the entropy of a system be capped at -273K?

I will probably add on to this question as I receive replies...Thanks!

submitted by /u/WaAhLcK
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What is the science behind "seasoning cast iron pans"?

Posted: 01 Apr 2016 05:03 AM PDT

Why when I throw an object in the air in a moving vehicle, such as a bus, does in not fly to the back?

Posted: 02 Apr 2016 03:41 AM PDT

I always assumed that once the object left contact with anything in the vehicle, then it would move independently of the vehicle?

submitted by /u/TheHornyToothbrush
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Are there any theorems that relate prime numbers to polynomials?

Posted: 01 Apr 2016 06:10 PM PDT

Are there any interesting theorems that relate these two things? Sorry if this is a broad question

submitted by /u/CaptainLocoMoco
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How does our body tell the difference between touch and pain?

Posted: 01 Apr 2016 07:03 PM PDT

What is happening at a nerve level. I understand that the sensory neurone sends a message to the brain, but how does the brain know how to interpret that message?

submitted by /u/FrenchButcher
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How do we measure the mass of particles i.e. electron, protons etc?

Posted: 01 Apr 2016 04:40 PM PDT

It's my understanding that's electrons, muons and tau and nearly identical, at least in their charge. But they differer only in mass. How do we measure the mass of these particles?

Thanks!

submitted by /u/iTechie
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Is there a particular shape coffee/tea cup that keeps the beverage hotter, longer?

Posted: 01 Apr 2016 07:11 AM PDT

I'm a pretty slow coffee drinker, so it tends to cool off quite a bit before I get to drink it all. So, usually, it's not palatable by the time I get around to wanting to finish it off. I got to thinking this morning, is there a shape of cup in which the surface area or distribution of the drink would allow it to stay at a higher temperature over time?

I am fully aware that I can use a cup with a lid or a thermos, but I'm more so curious if anyone with a knowledge of Thermodynamics (or whatever field this would apply to) would have an answer to the best shape coffee mug for retaining temp and why it would do so.

Thanks!

submitted by /u/Papagayo_blanco
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Why are cargo ships rounded off on the bottom?

Posted: 01 Apr 2016 06:53 PM PDT

With the idea that the more volume, the more water displaced, the greater buoyant force, why are cargo ships rounded inward on the bottom rather than shaped like a large cargo box. Wouldn't the ship be able to hold more with the increase volume by extending the size of the bottom?

For example this: https://goo.gl/hSSX1A rather than a full rectangular bottom?

submitted by /u/the_chosen_one2
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