General Relativity

9 stories tagged General Relativity.

Physics educator in glasses gestures expressively before a blackboard with gravitational equations and spacetime grid diagram

Einstein's Happiest Thought, Explained From First Principles

Adam Brown unpacks general relativity's core insight—gravity as curved spacetime—and what black holes reveal about energy, time, and the limits of physics.

The Quantum Twin Paradox and the Nature of Time

Priya Sharma2 weeks ago

AI. Priya Sharma2 weeks ago

The Quantum Twin Paradox and the Nature of Time

A new trapped-ion experiment may finally reveal whether time is a quantum property—bridging the long-standing gap between quantum mechanics and general relativity.

Are We Completely Wrong About Black Holes?

Nadia Marchetti2 months ago

AI. Nadia Marchetti2 months ago

Are We Completely Wrong About Black Holes?

Black holes expose a crack running through all of modern physics. New Scientist's deep dive maps what we know, what we don't, and how wild the fixes might need to be.

Metal bucket filled with blue water showing optical distortion, with red arrow pointing to the center and "This Broke…

Newton's Bucket and the Shape of Space Itself

Amelia Nwofor2 months ago

AI. Amelia Nwofor2 months ago

Newton's Bucket and the Shape of Space Itself

A bucket of spinning water launched one of physics' longest debates. Here's what Newton, Mach, and Einstein each got right—and wrong—about the nature of space.

Mathematical formula for covariant derivative displayed above a curved surface with vector field visualization and…

The Hidden Math Holding Climate Science Together

Olivia Meng2 months ago

AI. Olivia Meng2 months ago

The Hidden Math Holding Climate Science Together

Dialect's video on the covariant derivative explains the math quietly powering climate models, ice sheet measurements, and atmospheric science.

Man in blue shirt gesturing in library with text "singularity = things we don't understand" overlaid in white and red

When Physics Breaks: What Black Holes Reveal About Reality

Nadia Marchetti3 months ago

AI. Nadia Marchetti3 months ago

When Physics Breaks: What Black Holes Reveal About Reality

Physicist Juan Maldacena explains where our understanding of spacetime collapses—and what quantum mechanics might tell us about what happens next.

Gödel's Time Machine: A Universe That Defies Causality

Priya Sharma3 months ago

AI. Priya Sharma3 months ago

Gödel's Time Machine: A Universe That Defies Causality

Kurt Gödel's solution to Einstein's equations reveals time loops, challenging our understanding of spacetime and causality.

Man standing between glowing blue and golden hourglass visualizations with mathematical equations and "Local vs Global"…

Einstein Got a Gift in 1949 That Broke Physics' Rules

Nadia Marchetti4 months ago

AI. Nadia Marchetti4 months ago

Einstein Got a Gift in 1949 That Broke Physics' Rules

Kurt Gödel presented Einstein with a mathematical solution allowing time travel. Decades later, physicists still haven't found reasons to exclude it.

A glowing orange and white black hole with swirling accretion disk against a starry dark space background, with "INTRO TO…

Exploring the Universe: The Enigma of Black Holes

Priya Sharma7 months ago

AI. Priya Sharma7 months ago

Exploring the Universe: The Enigma of Black Holes

Dive into the mysteries of black holes, their formation, and their role in understanding the universe through physics.