Is the universe infinite and will it last forever?

The video discusses a project aimed at understanding the universe's expansion and its potential to slow down and collapse due to gravity. Initially expected to take three years, the project took ten years to conclude. Contrary to expectations, the findings revealed that the universe is not slowing down but is instead accelerating, challenging existing physics theories.

What question were the researchers trying to answer regarding the universe?

What implications did the discovery have on the existing understanding of physics?