spinochrome

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Eye. Eyelash. Eyeball. Vision.

7 Vestigial Features of the Human Body

Nativity Scene, Adoration of the Magi, Church of the Birth of the Virgin Mary, Montenegro

Why Is Christmas in December?

Black widow spider

9 of the World’s Deadliest Spiders

Bog body. Head of Tollund Man. Died at about age 30-40, Dated to about 280 BCE early Iron Age. Found Bjaeldskovdal bog Denmark in 1950 near Elling Woman. Most well preserved bog body to date. Human remains mummified in natural peat bogs. mummy, embalm

9 Noteworthy Bog Bodies (And What They Tell Us)

Ruminant. Deer. Red deer. Cervus elaphus. Buck. Stag. Antlers.

9 of the World’s Deadliest Mammals

Mount Everest (Mt. Everest, mountains, Himalayas).

Is Mount Everest Really the Tallest Mountain in the World?

Mother tickling her daughter, sitting in a garden

Why Can’t You Tickle Yourself?

spinochrome

biochemistry

Learn about this topic in these articles:

biological coloration

In coloration: Naphthoquinones
These are the echinochromes and spinochromes, so named because they are conspicuous in tissues and in the calcareous tests (shells) of echinoids, or sea urchins.
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