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Gravity Seems Holographic. What Does That Mean for Reality?
The biggest breakthrough in modern theoretical physics is the discovery that gravity can collapse the dimensions of space. Physicists don’t yet understand the implications.
Entanglement Builds Space-Time. Now “Magic” Gives It Gravity.
In holographic theories, physicists may have traced the pliability of space-time to its quantum roots: a measure of quantumness known as “magic.”
In Expanding de Sitter Space, Quantum Mechanics Gets Even More Elusive
The basic shape that best describes our expanding universe is also the hardest shape for physicists to understand.
Old ‘Ghost’ Theory of Quantum Gravity Makes a Comeback
Has the secret to understanding gravity been hiding in plain sight for nearly 50 years?
Carlo Rovelli’s Radical Perspective on Reality
The theoretical physicist and best-selling author finds inspiration in politics and philosophy for rethinking space and time.
A New Geometry for Einstein’s Theory of Relativity
A team of mathematicians based in Vienna is developing tools to extend the scope of general relativity.
Is Gravity Just Entropy Rising? Long-Shot Idea Gets Another Look.
A new argument explores how the growth of disorder could cause massive objects to move toward one another. Physicists are both interested and skeptical.
Singularities in Space-Time Prove Hard to Kill
Black hole and Big Bang singularities break our best theory of gravity. A trilogy of theorems hints that physicists must go to the ends of space and time to find a fix.
Can Quantum Gravity Be Created in the Lab?
Quantum gravity could help physicists unite the currently incompatible worlds of quantum mechanics and gravity. In this episode, Monika Schleier-Smith discusses her pioneering experimental approach, using laser-cooled atoms to explore whether gravity could emerge from quantum entanglement.