We asked 100 scientists about unsolved problems in their fields. They sent back provocations — on the origins of life, the ...

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years ago in a cave near Les Eyzies in the Dordogne, France. Credit: SEARCHING: Our Quest for Meaning in the Age of Science Dr. Alan Lightman has been around the block a few times. Over the past five ...

Teachers often face difficult questions about evolution, many from parents and others who object to evolution being taught. Science has good answers to these questions, answers that draw on the ...