Boundaries for preserving fresh water, biodiversity and other planetary resources tighten when they must also protect people

New drugs called antibody-drug conjugates help patients with cancers that used to be beyond treatment

The effort to give robots AI brains is revealing big practical challenges—and bigger ethical concerns

Stimulating the sleeping brain may ease suffering from memory loss, stroke or mental health problems

Three-dimensional printouts of stellar nurseries are helping to reveal how stars are born

The upcoming total solar eclipse and a pair of new sun probes are revolutionizing scientists’ understanding of our closest star