The Day the Universe Rang Like a Bell
On September 14, 2015, LIGO detected a ripple in spacetime from two black holes colliding 1.3 billion years ago. The story of how we learned...
Journal
Journal
Inside a Black Hole, Gravity Stops Being a Force and Becomes Geometry
From Karl Schwarzschild's battlefield equations to the first photograph of M87's shadow — how black holes went from mathematical curiosity to observed reality.
Your Head Is Older Than Your Feet — Here's the Proof
Image: EHT Collaboration / ESO Right now, at this very moment, the top of your head is aging faster than the soles of your feet....
Physics Says White Holes Must Exist — We Just Haven't Found One
Run a black hole backward and physics says a white hole emerges. Carlo Rovelli argues they are real — and quantum gravity demands them.