Brian Cox's Adventures in Space and Time — S01E04 — What is Time?

00:00:06 For more than a decade, I've made programmes about the universe.

00:02:53 Our experience of the world is that the past is written,

00:04:41 Which is that we live on a ball of rock,

00:07:08 On the east side, everything's darkening up quite nicely

00:09:31 Goodbye, sun! Good.

00:11:56 Its walls were once brilliant white and covered with painted figures.

00:14:44 It's probably one of our earliest attempts to begin to measure

00:16:54 This is the home of the US Naval Observatory,

00:19:01 This is the master clock system one. Oh, yeah.

00:22:20 On nights like these for the last 100 million years,

00:25:36 The time that ticks on your watch is the time now,

00:27:55 Because in some sense, it's... 3D is the wrong word.

00:29:45 As we keep going and you get to the smaller ones,

00:32:13 in the direction of the flow of time, if you like.

00:34:47 It's going to become less ordered.

00:37:39 to disorder.

00:39:49 is tied in to the tragedy of human experience.

00:42:19 Our lives are a series of moments

00:44:36 Probably!

00:47:09 So they haven't got as much left to move through time,

00:49:23 and if I can travel fast enough, such that I come back 1,000 years

00:52:24 On 5th September 1909, she ran aground in thick fog.

00:55:14 will be nothing but a sea of photons

00:57:40 They're all going to dissolve into a bath of photons!