News Cosmology

Despite a new measurement, the debate over the universe’s expansion rages on

A new cosmic microwave background estimate weakens claims that experimental error is to blame

Atacama Cosmology Telescope

A new measurement from the Atacama Cosmology Telescope (shown) deepens confusion over how fast the universe is expanding. The telescope measures ancient light emitted shortly after the Big Bang.

Debra Kellner

By Emily Conover

- More than 2 years ago

When it comes to the expansion rate of the universe, physicists have apparently agreed to disagree.