CAN a new garment be made out of old material? This is the problem which the authors have set themselves; and it must be admitted that they have not succeeded. They have produced an interesting and ...

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...

A number of advanced energy technologies - including fuel cells, electrolyzers, and an emerging class of low-power electronics - use protons as the ...