Some animals ‘see’ the world through oddball eyes

Scientists' understanding of animal sight has taken a turn toward the bizarre

Sea urchin

STRANGE VISIONS  A lab image of a juvenile purple sea urchin (Strongylocentrotus purpuratus) — without obvious eyes — shows an abundance of light-detecting proteins, such as c-opsins (red).

E.M. Ullrich-Lüter Et Al/Integr. Comp. Biol. 2013

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