Why are some things darker when wet?
ELIF5 explanation: <a href="https://www.reddit.com/r/explainlikeimfive/comments/e6czsd/eli5_why_do_things_turn_dark_when_wet/?utm_source=share&utm_medium=ios_app" rel="nofollow">https://www.reddit.com/r/explainlikeimfive/comments/e6czsd/e...</a>