The Walter Boas medal is given annually by the AIP for the “research making the most important contribution to physics” done in Australia in the preceding four years. The citation for Howard Wiseman’s award in 2021 is: “For elucidating fundamental limits arising from quantum theory, in particular in its applications to metrology and laser science, and via its implications for the foundations of reality.” As this indicates, the work for which the medal was awarded was quite varied. In the article below, Professor Wiseman concentrates on two highlights: Heisenberg-limited lasers and a theorem stronger than Bell’s.