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alcohol algae Allosaurus animals answer your question asked birds black widow spider blood body bones brain breathe Brontosaurus burn California called carbon dioxide cells chemical chlorine cloud cold color color vision cool different kinds dinosaurs dogs dreams droplets eardrum ears earth electric eyes feel fish follicle fossil freeze frog glass grow guess hair hair follicles happen heat humans ice cube idea insects inside keep lacrimal glands layer legs light live look male mammals melanin molecules Moon moving muscles never nose noticed ocean oxygen particles plants push reflex reflex action retina salt scientists skin slowly snakes sometimes sound spider stars stuff sunlight suppose surface sweat talk tell temperature things tiny Triceratops turn usually vibrations vocal sacs warm watch water molecules waves wondered wood York