Percentage Of Endemism Research Articles

Cosmic Rays and the Origin of Species

UNDER the above title, Dr. Hamshaw Thomas in a recent paper1 has put forward the suggestion that the large variety of species and high percentage of endemics often found at high altitudes might be due to mutants which have been produced by irradiation with cosmic rays, the intensity of which is known to be much higher at great altitudes than at sea-level.