Gravity Research update Universe could have a fifth less mass than current estimates Galactic-cluster X-rays may not come from hot gases Read article: Universe could have a fifth less mass than current estimates
Gravity Research update Cosmic collision explained without dark matter Physicists suggest modified gravity as an alternative Read article: Cosmic collision explained without dark matter
Gravity Research update Did the early universe have “texture”? Cold spot could shed light on unification
Gravity Opinion and reviews Gravitation Robert P Crease explains how Newton's law of gravitation also influenced human nature Read article: Gravitation
Telescopes and space missions Research update Selene blasts off for the Moon Japan’s spacecraft will look into the moon’s origin and evolution Read article: Selene blasts off for the Moon
Particles and interactions Feature Stringscape A grand journey through string theory Read article: Stringscape
Particles and interactions Opinion and reviews A testing time for strings String theorists must make clear their links with experiment Read article: A testing time for strings
Particles and interactions Opinion and reviews String theory under scrutiny Nancy Cartwright and Roman Frigg ask if falsifiability is a true judge of string theory Read article: String theory under scrutiny
Planetary science Research update Modified gravity fails at long distances Only short-range modifications to Newton’s law fit planetary orbit data
Gravity Research update ‘Cosmic train wreck’ stumps dark-matter physicists Localized “core” of dark matter is unusual in a galaxy cluster merger Read article: ‘Cosmic train wreck’ stumps dark-matter physicists