/u/cheline3's posts in /r/askscience

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When you cross 2 different colored lights they make a different color. (ex: red + green=yellow). Is this due to a physical effect or just due to how our eyes are made?

1032 upvotes

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Why do we freeze for a split second when something startles us or makes us jump?

212 upvotes

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What stops a battery from being recharged forever?

33 upvotes

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Why can't medical scientists collect data from a group of people and use the same human control group for every medical experiment in the future so that participants in a study don't have to risk taking a placebo?

5 upvotes

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Is there a 3d function that is continuous along any line but discontinuous along another function?

1 upvotes

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Why are so many math theorems bounded by a seemingly arbitrary integer?

1 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
When you cross 2 different colored lights they make a different color. (ex: red + green=yellow). Is this due to a physical effect or just due to how our eyes are made?	1032
Why do we freeze for a split second when something startles us or makes us jump?	212
What stops a battery from being recharged forever?	33
Why can't medical scientists collect data from a group of people and use the same human control group for every medical experiment in the future so that participants in a study don't have to risk taking a placebo?	5
Is there a 3d function that is continuous along any line but discontinuous along another function?	1
Why are so many math theorems bounded by a seemingly arbitrary integer?	1