Not much to show for a human lifetime, even if it was only seventeen years.

One long human lifetime, an eyeblink in the history of a world.

If that's true, imagine what we could become, within just a human lifetime.

We know how to do it, even with present technology, in less than a human lifetime.

The star could then be reached in 50 years, within a human lifetime.

But added to that was the data, the memories, the personality of a human lifetime.

"Only you could choose two men in one human lifetime that are this confusing."

But consider continental Europe over the past 70 years - until recently a normal human lifetime.

A human lifetime's worth of labor was turned to dust in an instant.

In a real way, eternity is merely the living of one human lifetime after another.