water condensation on copper: I believe this was a Moscow Mule by jdams2 http://bit.ly/2bRLxFP

via http://bit.ly/2bsSaxW

frost and sun: frost and sunlight on winter windowpane by art911 http://bit.ly/2bEBNvu

via http://bit.ly/2bpCbfD

Flower final: This photograph was taken in the Muttart conservatory in Edmonton, Alberta during an afternoon outing. I was impressed by the patterns that this particular plant displayed. by RickCoswan http://bit.ly/2bRLNop

via http://bit.ly/2bsRNDl

abstract: light and colors in forest by moonray83 http://bit.ly/2bECmWe

via http://bit.ly/2bpBXVN

on the milky way: Twitter account: https://twitter.com/naokikim_stock by naoki1986gogo http://bit.ly/2bRMqOL

via http://bit.ly/2bsRYPn

Air Conditioning: by juliaswan_ http://bit.ly/2bEAZqz

via http://bit.ly/2bpC3fU

Refraction exercise 1: Just glasses, water and background by javaap http://bit.ly/2bRLud7

via http://bit.ly/2bsS9Ko