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In a new sign of toolmaking in marine mammals, orcas in the Pacific Northwest were recorded rubbing stalks of kelp against each other’s bodies, a study shows.
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Stars passing close to the sun could cause planets to collide, including with Earth, or even be ejected as rogue planets, new simulations show.
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Nuclear experts say the president’s rejection of the restrictive deal forced him to neutralize an Iranian threat of his own making.
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Two new studies add to the evidence that human activity, from fishing to urban development, is driving the evolution of wild animals.
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The Best Illusion of the Year contest offers researchers, and participants, an opportunity to explore the gaps and limits of human perception.
