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5/2/15 Cover


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toy stegosaurus

This toy stegosaurus isn’t a wholly accurate reproduction of the species. But based on the shape of its plates, it may be more like a female than a male of its species, a new study suggests.

Radix balthica snail

TOUGH STUFF  Radix balthica snails can behave boldly or shyly when spooked. An individual snail's behavior appears to be linked with the strength of its shell.

Spiderlings crowd over their mother

KIDS TODAY  Tiny yellow spiderlings (shown close up) crowd over their gray mother, whom they will eventually eat.

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