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A bull elk in spring, shedding its winter coat and with its antlers covered in velvet
A cyanotic infant. Note the bluish tinge to the skin around the lips, chin, and nose
Internal structures of main sequence stars, convection zones with arrowed cycles and radiative zones
Dimmer Distant Supernova
Sun's composition of Gases.
Group defenses: Cluster of sawfly caterpillars regurgitating fluid (yellow) that predators find unap