The kids have been asking about “time”. Like “what is time?” Imagine sitting at the dinner table trying to explain it…

Here’s one video that takes a crack at an answer to “What is time?”

- Part 2
- Part 3
- Part 4
- Part 5

See also:

1) What is Time?

If we put all this together, the picture we get is that there is only one speed we are able to travel at, and that is the speed of light, and it is a combination of our speed through space and through time. The faster we travel through the dimensions of space, the slower we travel through the dimension of time, and vice versa. Thus an astronaut zooming along at light speed has used up all their speed ‘allocation’ in the space dimensions, and as a consequence does not travel through time. This would seem to suggest that the speed of light really is the limiting speed within the universe, and if we had no motion at all through space then we would be travelling at light speed through time. In terms of our diagram, the more movement we make across the cube (space) the less we make in the direction of height (time).

2) What is Time?

Every schoolchild knows what time is. But, for every schoolchild, there is a moment when they first encounter the paradoxes that lie just behind our everyday understanding of time. I recall when I was a child being struck all of a sudden by the question of whether time could end or whether it must go on forever. It must end, for how can we conceive of the infinity of existence stretching out before us if time is limitless? But if it ends, what happens afterward?

(This is the same point where my kids are at, trying to wrap their brains around time…)

3) What Is Time?

In order to get a better understanding of time, we consulted physicists, philosophers and religious scholars. We talked to doctors who study aging, a watch-company executive, and a man building a clock designed to last 10,000 years. We talked to time-management and productivity experts, including one who has built a lifestyle around working only four hours a week…