31.   At the time, the Stanford computer scientists had a good laugh at the expense of their hapless waiter.

32.   Atlanta is so big and hot that it makes its own weather, and scientists have the pictures to prove it.

33.   Because scientists do not have a full understanding of how HIV infects cells, clarifying the mechanism by which SLPI blocks infection could have broader importance.

34.   Before conductive fibers can arrive on the market, Gregory said, scientists will have a fundamental problem to overcome.

35.   Before the Apollo lunar explorations, scientists had three competing theories for the origin of the Moon.

36.   Before they can contemplate surgery, the scientists have to work out where to intervene.

37.   A Japanese scientist has some of it, a doctor in Philadelphia other parts.

38.   A. Well, a scientist should have.

39.   After all, the original concept was that of a giant puzzle that scientists had to unravel.

40.   All the scientists have to find funding for their projects, which means competitive applications for federal grants or other funds.