Uploaded June 2026 | Updated September 2026, 2 weeks ago

---

From the beginning of our universe 13.7 billion years ago to its eventual, inescapable end, one fundamental force drives everything: the relentless arrow of time. In this gripping exploration of deep time, we uncover how the second law of thermodynamics and the inevitable rise of entropy dictate the fate of the cosmos. Journey from ancient solar calendars in Peru to a Patagonian glacier collapsing under 1 million tons of ice per day, and out into the deepest reaches of space.

Subscribe to Spark for more amazing science, tech & engineering videos: goo.gl/LIrlur 🚀

Join the Spark Channel Membership to get access to perks:
youtube.com/channel/UCMV3aTOwUtG5vwfH9_rzb2w/join

You can now become a History Hit member right here on YouTube! Join for access to a new exclusive documentary every week, and access to over 160+ of our documentaries presented by world renowned historians like Dan Snow, Eleanor Janega, Tristan Hughes, Mary Beard, Matt Lewis and more.
Get an exclusive release every week by signing up here: bit.ly/4pyExyn

Any queries, please contact us at: owned-enquiries@littledotstudios.com

#Spark