PBS Space Time backdrop
No Image

The Universe Is Racing Apart. We May Finally Know Why.

Feb 19, 202621 min
Discussion

We've known that the universe is expanding since 1929, and that its expansion is accelerating since 1998. The culprit behind the acceleration is unknown, so we live with a stand-in term "dark energy". Our modern cosmological model assumes that dark energy has a constant density--always

Season 2026 Episodes16

Cast1

Matthew O’Dowd

Matthew O’Dowd

Self - Host

Discussion

0 comments

Join the conversation

Share your take and reply to other fans.

No comments yet

Be the first to share your thoughts on this episode.

Episode Summary

"The Universe Is Racing Apart. We May Finally Know Why." is episode 4 of PBS Space Time season 2026. It aired on February 19, 2026.