Mach's Principle
Majorana and the investigation of infrared spectra of ammonia
Majorana and the path-integral approach to Quantum Mechanics
Majorana and the quasi-stationary states in Nuclear Physics
Majorana: from atomic and molecular, to nuclear physics
Many Worlds, the Cluster-state Quantum Computer, and the Problem of the Preferred Basis
Mapping the Milky Way: William Herschel's Star-Gages
Marietta Blau's Work After World War II
Matter from Space
MELENCOLIA I: The physics of Albrecht Duerer
Memories of Murray and the Quark Model
Mendeleev and the Periodic Table of Elements
Meteoritics and cosmology among the Aboriginal cultures of Central Australia
Michael Pupin Idvorsky and father Vasa Zivkovic
Minkowski space-time: a glorious non-entity
Mirror Symmetry and Other Miracles in Superstring Theory
Misleading signposts along the de Broglie-Bohm road to quantum mechanics
Modelling Complexity: the case of Climate Science
Moments with Yakov Borisovich Zeldovich
More is the Same; Phase Transitions and Mean Field Theories