Birdwatch Note Rating
2024-01-17 18:08:14 UTC - NOT_HELPFUL
Rated by Participant: C609C0CF6A54DC273673781D6A355F0019E28FA22331F1D0A8300E423F94A2B8
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Original Note:
Sea urchins, like their close relatives the sea stars (starfish), don't technically have eyes. Instead, the ball-like invertebrates detect light striking their spines and compare the beams intensities to get a sense of their surroundings. https://www.nationalgeographic.com/science/article/100205-sea-urchins-spines-eyes
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