The sea sponge has no brain, no nerves and no organs, and it has been doing fine for 600 million years. Four questions to see how you compare.
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Quiz: Are You Smarter Than a Sea Sponge?
Published: October 14, 2025 at 4:00 PM
Question 1 of 4
A friend offers you $100 now or a magic bean that could be worth millions later. You choose:
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