The Abbey theory of image formation predicts that the spatial frequencies of the object will be displayed as a function of position in the image plane of the source. By use of apertures and beam stops ...

SOME animals, such as the earthworrn, have no eyes, and yet they are photoropic either in a positive or negative sens according as tney move towards or away from light. Others, such as planarians, ...

Is that an eye at the center of this cloud formation over the North Pacific? Scientists noticed it first, after seeing a satellite image. Facebook screenshot A satellite panning the North Pacific this ...

A satellite panning the North Pacific this week picked up something strange at the center of a cloud formation: A huge eye. It was spotted south of Alaska on Feb. 13 and posted on Facebook by ...