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Home > All Images > 1991 > May > 17 May 1991

Images Dated 17th May 1991

Choose from 5 pictures in our Images Dated 17th May 1991 collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.

LM of rhino horn Featured 17 May 1991 Image

LM of rhino horn

Polarised light micrograph of a cross-section of horn from the Indian rhinoceros. The horn consists throughout of keratin, and does not have a bony pith (unlike those of cattle). It is commonly held that rhinoceros horn consists of matted hair. Seen under a microscope, however, it is clear that the individual rods are not coated with a protective layer as is real hair. They adhere densely together in layers, thus they resemble neither the hair nor the horn of a ruminant, but rather the material of the hoof. A mistaken belief in the aphrodisiac properties of the powdered horn has led to all species of rhinoceros being hunted close to extinction. Mag: x100 at 35mm size