Thus these different phenomena were different aspects of the forces Lyell believed had operated over geological time to produce the world we see now. "The present is the key to the past," was the ...

A mysterious phenomenon at the centre of our galaxy could be the result of a different type of dark matter. Dark matter, the mysterious form of unobserved matter which could make up 85% of the mass of ...

WHEN materials of different kinds are subjected to mechanical actions we may observe a great variety of rheological phenomena, and we shall confine our attention here to a certain group of them ...