Life & Evolution

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dino egg

BLUE HUE  Fossilized eggshells of the dinosaur Heyuannia huangi harbor pigments that would have colored the shells in shades of blue and brown.

fruit ripening

GETTING READY  Ethylene, a gas, acts as a plant hormone. It tells fruits to ripen, roots to grow and seeds to germinate.

two dholes fighting

The endangered dhole preys on livestock in Nepal, putting the wild dogs in conflict with humans, a new study finds.

Life & Evolution

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