time - measurement and meaning - part 9 of 44. how does time move...what is "now"...what is reverse, or "backwards" time? this superb, up-to-date account of modern theoretical and practical physical science examines concepts of time dilation, the entropy - vintage cartouche stock videos & royalty-free footage00:33Time - Measurement and Meaning - part 9 of 44. How does time move...what is "now"...what is reverse, or "backwards" time? This superb, up-to-date account of modern theoretical and practical physical science examines concepts of time dilation, the entropy