Physical Review D

No Universe without Big Bang

According to Einstein's theory of relativity, the curvature of spacetime was infinite at the big bang. In fact, at this point all mathematical tools fail, and the theory breaks down. However, there remained the notion that ...

dateJun 15, 2017 in General Physics
shares3723 comments 171

No trace of dark matter in gamma-ray background

Researchers from the University of Amsterdam's (UvA) GRAPPA Center of Excellence have just published the most precise analysis of the fluctuations in the gamma-ray background to date. By making use of more than six years ...

dateDec 19, 2016 in Astronomy
shares3019 comments 38

Gravity wave detection with atomic clocks

The recent detection of gravitation waves (GW) from the merger of two black holes of about thirty solar-masses each with the ground-based LIGO facility has generated renewed enthusiasm for developing even more sensitive measurement ...

dateMar 06, 2017 in Astronomy
shares3397 comments 42

The annihilating effects of space travel

Long distance space travel could create the ultimate 'killer entrance', devastating your destination and anything around the arriving spacecraft, according to calculations by Professor Geraint Lewis and two honours students ...

dateMar 12, 2012 in General Physics
shares0 comments 34