Riddles of Science Author:Sir J. Arthur Thompson A fascinating study of those aspects of human life and natural science which have thwarted complete scientific explanation up to the present time. The author, a well-known English scientist, provides part of the answers to such questions as what is protoplasm, what are enzymes, why do we laugh, why does our hair turn gray, do animals think, wha... more »t is the secret of the homing pigeon, and dozens of other matters that have puzzled and still elude scientific solution, at least in some measure. Those areas of knowledge which are still murky are clearly pointed out; and in some cases, the direction of future research is indicated. Here is a book that will delight the inquiring mind.« less