His mother's increasing deafness led the young man to study acoustics -- the way we hear and how sounds are made.

VOA: special.2010.05.14

But here is something that scientists now know: A team led by Professor Fu has reported the first genetic link to how much sleep we need.

VOA: special.2009.08.26

Today,we tell about Percival Lowell whose work led to the discovery of Pluto.

VOA: special.2010.07.11

Leaving only a handful that survived. Flight Eleven and One Seventy-Five with the illegal medications that overdosed our population, led us to receive a leave of absence for an unnecessary vacation and we became addicts.

VOA: special.2009.04.17

"And if we don't change what led to the crisis, we'll doom ourselves to repeat it."

VOA: standard.2010.04.19

"I have actually led the way I saying that we are prepared to make the additional troops available for the Afghanistan strategy so we are able to show people that we have a strategy for the time ahead as well,"

VOA: standard.2009.11.10

"Even though we have slowed the loss of jobs,and today's report on the continued decline in unemployment claims is a hopeful sign, the economic growth that we have seen has not led to the job growth that we desperately need,"

VOA: standard.2009.11.12