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Life & Evolution

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Harding Icefield in Alaska

SNOW DECORATION  Algae turn the snow pink and red on parts of Alaska’s Harding Icefield. New research finds that the pink snow melts faster than clean snow.

Polypterus

PRIMITIVE FISH  Polypterus (shown) is a living member of a large group of vertebrates called ray-finned fishes. New evidence suggests that ray-finned fishes arose about 360 million years ago, after a major extinction event, then their diversity exploded.

sea slug

SLIMED  When startled, the dusky slug (Arion subfuscus) produces a goopy defense slime that slows down predators. Scientists are studying the chemical structure of this goo to make better surgical adhesives.

Life & Evolution

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