Stories by George Wald

Life depends on a narrow band in the electromagnetic spectrum. This is a consequence of the way In which molecules react to radiation, and must hold true not only on earth but elsewhere in the universe

The biologist seeks to explain life in terms of the physical sciences, but the explanation will require physical sciences adequate to cope with the unique behavior of living systems

How did living matter first arise on the earth? As natural scientists learn more about nature they are returning to a hypothesis their predecessors gave up almost a century ago: spontaneous generation

The classical comparison of the two devices is still fruitful. Today it has gone beyond their optics into their basic physics and chemistry