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Stories by Jeff Tollefson

Nuclear Summit a Test for Obama's Legacy

Nuclear Summit a Test for Obama's Legacy

US president pushed world to secure radioactive materials, but the threat of nuclear warfare — and terrorism — remains

March 31, 2016 — Jeff Tollefson and Nature magazine
Obama's Budget Seeks Big Boost for Science

Obama's Budget Seeks Big Boost for Science

The White House plan would increase research and development funding but faces a rough road in Congress

February 3, 2015 — Boer Deng, Richard Monastersky, Lauren Morello, Sara Reardon, Jeff Tollefson and Nature magazine