Scientists have never understood why rhinoceros horns are curved and pointed. A new study reveals why. The horns of most animals have a bony core covered by a thin sheath of keratin, the stuff of hair ...
Proceedings of the National Academy of Sciences of the United States of America, Vol. 119, No. 12 (March 22, 2022), pp. 1-9 (9 pages) Light propagation on a two-dimensional curved surface embedded in ...
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