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The world’s deadliest mosquito-borne disease, malaria, is in decline. But illnesses transmitted by a different mosquito, which include Zika and dengue, have increased sharply since the city-dwelling Aedes aegypti reinvaded the Americas.
A new way of making these tough materials could be a key step in producing better airplane engines and long-lasting machine parts.
A hero of the Egyptian revolution laments the limits of social media and hopes to improve online dialogue.
A quarter-century ago, a “protracted battle” over encryption began between law enforcement and civil-rights activists.
More industries are looking for ways to use artificial intelligence. What will that mean for the technology’s future?