Nima Arkani-Hamed

"Edward Witten has spent almost 50 years at the forefront of theoretical and mathematical physics. Here he describes how the LHC and other recent results have impacted his view on nature, and asks whether naturalness is still a useful guide for the field."

The Strings 2021 conference, convening international experts and researchers to discuss string theory, takes place June 21–July 2, 2021, in São Paulo, Brazil. The annual international Strings conferences, which have been held every year since 1995...

The Standard Model of particle physics is both fantastically successful and glaringly incomplete. Its predictions have pieced together many of the known features of the universe and guided physicists to new discoveries, such as the Higgs boson...