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](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2020/07/071420_EC_expanding_feat.jpg?fit=1028%2C579&ssl=1)
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