Can an organism with no eyes still see? As it turns out for the purple sea urchin, the answer is yes. In a short video, scientists explain why they believe that some sea urchins can use their spikes to visually sense the environment. 

Concepts

sense of vision, the five senses, adaptations

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Additional Tags

adaptation, vision, sea urchins, science

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Pros

• Interesting and informative in just a minute and a half
• Examines the evidence supporting the claim
• Shows a unique adaptation 

Cons

• No supporting lessons or activities