rad1

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21 reputation

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visits	member for	7 months
	seen	Oct 13 '12 at 19:54
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10

Apr 3

+10

20:14

upvote

Is there still light in practical darkness? Do photons penetrate everywhere?

10

Oct 14 '12

+10

15:13

upvote

Is there still light in practical darkness? Do photons penetrate everywhere?

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