Latest about Expert Voices - Paul Sutter
How close can you get to a black hole?
Physicists are figuring out how close you can get to a black hole before you are unlikely to escape. That threshold is called the innermost stable circular orbit (ISCO).
Where do baby magnetars come from? Mysterious 'fast radio bursts' may provide clues.
Magnetars — highly magnetized, rapidly rotating super-dense stars — are among the most enigmatic creatures to inhabit the cosmos and their origins are shrouded in mystery.
What happened before the Big Bang?
Has our universe cycled through numerous "big crunches" and "big bounces?"
Hunting for dark matter — inside the Earth
The answer to the dark-matter mystery may be under our feet.
When did the universe 'wake up'?
It was a big moment for our cosmos when the first stars awoke, but it's an elusive one for scientists.
Oddball sexaquark particles could be immortal, if they exist at all
These supremely stable particles could explain dark matter.
Why Has String Theory Persisted?
String theory is a powerful idea, unfinished and untested, but one that has persisted for decades despite inauspicious beginnings.
