It can feel like a brain teaser, but the universe is considered everything within the universe. In the expanding universe, there is no pan. Just dough. Even if there were a pan, it would be part of the universe and therefore it would expand with the pan.

For decades, scientists have disagreed about a fundamental question: how quickly is the Universe expanding? But this year, astronomer Wendy Freedman announced results that could help to put the controversy to rest.