"For the last 20 years, people believed that the cosmological constant is positive, and the universe will expand forever," Tye says. "The new data seem to indicate that the cosmological constant is ...

We’ve grown up with the idea that the universe will expand forever, meaning the "cosmological constant" is positive. What if ...

"Fast radio bursts shine through the fog of the intergalactic medium, and by precisely measuring how the light slows down, we can weigh that fog, even when it's too faint to see." Half of the universe ...