The Biggest Breakthroughs in Physics: 2025

In 2025, physicists spotted a paradigm-shifting new black hole, doubled down on weakening dark energy, and discovered that the Earth's deep interior may be more connected than previously thought, reshaping our picture of the planet’s engine.

Little Red Dots

The James Webb Space Telescope has found a lonely black hole in the early universe that’s as heavy as 50 million suns. A major discovery, the object confounds theories of the young cosmos.

Weakening Dark Energy

Last year, an enormous map of the cosmos hinted that the engine driving cosmic expansion might be sputtering. Now, physicists are back with an even bigger map, and a stronger conclusion.

Geophysics of Earth's Core

Strong new evidence suggests that primordial material from the planet’s center is somehow making its way out. Continent-size entities anchored to the core-mantle boundary might be involved.