/u/graaahh's posts in /r/askscience

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When something small flies towards my eyes and they snap shut, what's going on? Is my brain capable of seeing something and reacting that fast, or do my eyes snap shut when it touches my lashes, or what?

14 upvotes

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Most of the light omitted by our sun is in the green spectrum, so why do the majority of plants (that require the sunlight to convert CO2 and H2O into sugars) reflect away the green, and absorb the other colors instead?

13 upvotes

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Is it possible to predict the physical properties of a chemical based on its formula?

13 upvotes

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Why are there two bones in our forearms and shins? Does this feature serve some important function?

12 upvotes

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If the fourth dimension is time, why are 4D objects shaped so weird? Why would time affect shape?

11 upvotes

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Why do pieces of wire need to be soldered together? Does the metal-metal contact not conduct electricity fine on its own? If not, why not?

10 upvotes

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Why do trans-Neptunian objects all seem to have orbits that are highly tilted?

10 upvotes

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What effect did the KT event have on continental drift?

8 upvotes

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Why can't an atom hold more neutrons?

8 upvotes

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Is there a correlation between ambiguous genitalia and premature birth?

6 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
When something small flies towards my eyes and they snap shut, what's going on? Is my brain capable of seeing something and reacting that fast, or do my eyes snap shut when it touches my lashes, or what?	14
Most of the light omitted by our sun is in the green spectrum, so why do the majority of plants (that require the sunlight to convert CO2 and H2O into sugars) reflect away the green, and absorb the other colors instead?	13
Is it possible to predict the physical properties of a chemical based on its formula?	13
Why are there two bones in our forearms and shins? Does this feature serve some important function?	12
If the fourth dimension is time, why are 4D objects shaped so weird? Why would time affect shape?	11
Why do pieces of wire need to be soldered together? Does the metal-metal contact not conduct electricity fine on its own? If not, why not?	10
Why do trans-Neptunian objects all seem to have orbits that are highly tilted?	10
What effect did the KT event have on continental drift?	8
Why can't an atom hold more neutrons?	8
Is there a correlation between ambiguous genitalia and premature birth?	6