But as he says, the search for life in outer space is a long-term goal, and he is still hopeful.

VOA: special.2010.05.25

The lens in my expensive microscope was still not strong enough to answer my questions about life.

VOA: special.2009.07.18

Lincoln said to the old man: "When I think of the sacrifices of life still to be offered, and the hearts and homes to be made lonely before this terrible war is over, my heart is like lead.

VOA: special.2009.11.12