obituary

Aleksandr Samokutyaev, a Russian cosmonaut and former ISS crew member, has died at age 56, becoming the first former ISS crew member to die. He flew on two missions and performed two spacewalks.

Pioneering Australian melanoma doctor Richard Scolyer has died at 59 after undergoing a world-first experimental immunotherapy treatment for glioblastoma. His work with Georgina Long dramatically improved survival rates for advanced melanoma patients.

Cleve Moler, cofounder of MathWorks and creator of MATLAB, passed away at age 86. His contributions to numerical computing, including LINPACK and EISPACK, profoundly impacted science and engineering.

Peter Neumann, a pioneering computer security researcher and Multics contributor, has passed away at a hospital in Santa Clara due to complications from a fall and surgery.

Peter Salus, author of 'A Quarter Century of Unix' and a key figure in Unix history, has passed away on May 15.