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The Sumatran rhinoceros (Dicerorhinus sumatrensis), also known as the Sumatran rhino, hairy rhinoceros or Asian two-horned rhinoceros, is a rare member of the family Rhinocerotidae and one of five extant species of rhinoceros; it is the only extant species of the genus Dicerorhinus. It is the smallest rhinoceros, although it is still a large ...
Categorization of racial groups by reference to skin color is common in classical antiquity. [7] For example, it is found in e.g. Physiognomica, a Greek treatise dated to c. 300 BC. The transmission of the "color terminology" for race from antiquity to early anthropology in 17th century Europe took place via rabbinical literature.
The spectral sensitivity of M- and L-opsins maximize sensitivity to changes in skin color that correspond to blood oxygen levels. [28] Recognizing changes in skin tone that indicate states of health would be one advantage. Dichromatic humans report trouble with recognizing sunburn, rash, pallor and jaundice. [29]
The four pigments in a bird's cone cells (in this example, estrildid finches) extend the range of color vision into the ultraviolet. [1]Tetrachromacy (from Greek tetra, meaning "four" and chroma, meaning "color") is the condition of possessing four independent channels for conveying color information, or possessing four types of cone cell in the eye.
The Sumatran rhino, the smallest of five rhinoceros species, once roamed across Asia as far as India. Skip to main content. 24/7 Help. For premium support please call: 800-290-4726 more ...
Another Sumatran Rhinoceros was born in an Indonesian sanctuary last week, the Environment Ministry said, the second birth of this critically endangered animal at the reserve this year. The black ...
There is evidence that as many as 16 different genes could be responsible for eye color in humans; however, the main two genes associated with eye color variation are OCA2 and HERC2, and both are localized in chromosome 15. [10] The gene OCA2 (OMIM: 203200), when in a variant form, causes the pink eye color and hypopigmentation common in human ...
The last Sumatran rhinoceros in Malaysia died on Saturday, leaving the smallest species of rhino, which once roamed across Asia, surviving in small numbers mostly in Indonesia.