| SAGAN: We are drifting in
a great ocean of space and time. |
00:00:52.667 - 00:00:57.502 |
| In that ocean, the events
that shape the future... |
00:00:59.207 - 00:01:02.108 |
| ...are working themselves out. |
00:01:02.310 - 00:01:04.710 |
| Each creature and every world,
to the remotest star... |
00:01:06.915 - 00:01:10.248 |
| ...owe their existence to... |
00:01:10.451 - 00:01:12.351 |
| ...the great, coursing,
implacable forces of nature... |
00:01:12.554 - 00:01:15.387 |
| ...but also, to minor happenstance. |
00:01:15.590 - 00:01:18.718 |
| We are carried with our planet
around the sun. |
00:01:21.262 - 00:01:24.527 |
| The Earth has made more than
4 billion circuits of our star... |
00:01:24.732 - 00:01:28.168 |
| ...since its origin. |
00:01:28.369 - 00:01:30.200 |
| The sun itself travels about
the core of the Milky Way galaxy. |
00:01:32.240 - 00:01:36.142 |
| Our galaxy is moving
among the other galaxies. |
00:01:36.344 - 00:01:38.972 |
| We have always been space travelers. |
00:01:39.180 - 00:01:42.547 |
| These fine sand grains are all,
more or less, uniform in size. |
00:01:44.352 - 00:01:49.221 |
| They're produced from bigger rocks
through ages of... |
00:01:50.124 - 00:01:53.355 |
| ...jostling and rubbing,
abrasion and erosion. |
00:01:53.561 - 00:01:57.395 |
| Driven in part by
the distant moon and sun. |
00:01:57.599 - 00:02:01.467 |
| So the roots of the present
lie buried in the past. |
00:02:01.803 - 00:02:05.364 |
| We are also travelers in time. |
00:02:05.573 - 00:02:09.339 |
| But trapped on Earth... |
00:02:13.815 - 00:02:15.043 |
| ...we've had little to say about
where we go in time and space... |
00:02:15.249 - 00:02:18.582 |
