December stories at the FCP site

The December stories at the main FCP site: (1) After decades of drinking beer from bottles, I finally noticed a peculiar spotting effect on the underside of the bottle caps, especially visible with dark beer. (2) The blind spots in a car’s mirror can easily hide another car or (as seen in the video) something far more valuable. (3) A visual effect I have never seen previously: the shadow of a hair in sunlight is diffuse and vague but move the hair and the shadow becomes dark and distinct. (4) Water is heavy and when dumped onto a forest fire or other objects must be released carefully. Here is an example where tons of water are suddenly pour out.

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