Physics
Time might flow backwards as well as forwards from the big bang
In the multiverse, pocket universes could be born with clashing directions of time 鈥� the evolving future of one could happen in the rewinding past of another
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Physics
New rumours that gravitational waves have finally been detected
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Physics
Supermassive black holes might be hiding entire universes inside
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Space
Giant galaxy caught tearing apart its little neighbour
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Physics
Can burping black holes reveal the true fabric of the universe?
Features
Physics
Dark matter’s true face could be unmasked by pairs of dead stars
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Humans
God vs the multiverse: The 2500-year war
Features
Space
Black holes have a size limit 鈥� of 50 billion suns
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Physics
Tiny dark matter stars would harbour particles that act as one
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Physics
Pathfinder blasts off to look for Einstein’s gravitational waves
Live at the launch of ESA's LISA Pathfinder spacecraft on the 100th anniversary of Einstein's publication of the theory of general relativity
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Space
How to encrypt a message in the afterglow of the big bang
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Physics
How to encrypt a message in the afterglow of the big bang
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Space
Spacecraft that will put Einstein to the test ready for lift-off
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Space
Black hole batteries could power mysterious radio bursts
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