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 ...

Around 540 million years ago, a rapid evolution of living things, known as the Cambrian explosion, led to diversification into various species. One of the reasons for this diversification was the ...

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 ...

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, ...

New imagery has been released from NASA’s Hubble Space Telescope, which captured a photo of a spiral galaxy more than 76 million light-years away from Earth. The galaxy known to observers as NGC 2566 ...