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
Quantum mechanics Research update “Cosmic forgetfulness” shrouds time before the Big Bang If there was a universe before the Big Bang, we may not be able to see all of it
Particles and interactions Research update Two relativity tests are better than one Lorentz invariance disentangled in Europe and Australia Read article: Two relativity tests are better than one
Particles and interactions Research update Director quits Canadian theory institute Howard Burton leaves Perimeter Institute for Theoretical Physics Read article: Director quits Canadian theory institute
Gravity Feature Sounding out the Big Bang How gravitational waves will probe the cosmos Read article: Sounding out the Big Bang
Gravity Opinion and reviews Life, the universe and everything The complete story of the cosmos Read article: Life, the universe and everything
Gravity Research update Black hole shrinks braneworld dimensions Tests of Newton's law may have to be more stringent
Gravity Research update Hunt for fifth force focuses on Bullet Cluster New force would require overhaul of the Standard Model Read article: Hunt for fifth force focuses on Bullet Cluster
Gravity Research update Gravity Probe B backs general relativity Satellite may not deliver on accuracy, claim critics Read article: Gravity Probe B backs general relativity