TIL When you open your eyes in a prefectly dark room you don't see black, but " eigengrau ", a shafe of grey en.wikipedia.org Submitted by mic3ttaa t3_zzmcr2 on December 31, 2022 at 5:23 AM in todayilearned 53 comments 282
timmyboyoyo t1_j2ctgbs wrote on December 31, 2022 at 7:54 AM The prefects checking if your eyes are open Permalink 4
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