Science: Light of Love?

June, traditional month for weddings, is also the month with the year's longest days. Professor Thomas Hume Bissonnette, of Trinity College at Hartford, Conn., thinks this no coincidence but scientific cause & effect. Last week he told of some experiments on animals which seem to prove that light (not temperature, as long supposed) is the prime external factor controlling love and mating.

Pink-cheeked, twinkling Biologist Bissonnette is one of the world's leading authorities on photoperiodicity — the study of the effect of light on animals' and plants' seasonal cycles. The earliest application of this science,...

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