Geerat Vermeij observes—with his fingers—mollusc defense strategies as revealed by the design of their shells. For him, shell defense design is analogous to aircraft designed to protect occupants.
Geerat Vermeij, Evolutionary Biologist: Reading A Shell’s Story
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All organisms endure an arms race. We have bacteria and antibiotics, that's kind of an arms race. We have shells and shell-breaking predators, that's a classic arms race. Everything in biology really is an arms race. -- Geerat Vermeij