News
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Planetary ScienceMars’ ionosphere mystery explained
A decades-old disagreement between the Viking landers and spacecraft buzzing around Mars might come down to what time of day each was investigating the Red Planet’s ionosphere.
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EnvironmentHome fires, farm fumes are leading causes of air-pollution deaths
Deadly air pollution comes from surprising sources, but toxicity of different types is still up in the air.
By Beth Mole -
AnimalsDogs flub problem-solving test
Confronting a tough task, dogs are more likely than wolves to give up and gaze at a human
By Susan Milius -
Science & SocietyShort memory can be good strategy
Game theory reveals that there’s a limit to the effectiveness of relying on prior results to predict competitors’ behavior.