Before you read the report, test your science knowledge by taking the interactive quiz. The short quiz tests your knowledge of questions recently asked in a national poll. After completing the quiz, ...

Not that long ago, most serious scientists considered cosmology a branch of philosophy. But in recent decades, observations by the Hubble Space Telescope and probes of the microwave radiation left ...

There are few simple answers in science. Even seemingly straightforward questions, when probed by people in search of proof, lead to more questions. Those questions lead to nuances, layers of ...

Climate change is tremendously complex — and we’re here to help. The climate desk at The Times has been collecting reader questions and has started answering them here. Type your question in the ...