We asked 100 scientists about unsolved problems in their fields. They sent back provocations — on the origins of life, the possibilities for human progress and much more.

The kingdom is in a state of strategic shock after coming under attack from an emboldened Iran and failing to win more U.S. military support, analysts say.

I’ve been trying to think more seriously about the entity that set off the LZ experiment. I was dismissive of the possibility of it being dark matter, perhaps unfairly so. On further reflecti…

A study published by Public Health Scotland finds that the HPV vaccine is "highly effective".