Arthur Conan Doyle,creator of the fictional detective Sherlock Holmes, wrote about Poe's influence on other crime writers: "Each may find some little development of his own, but his main art must trace back to those admirable stories of Monsieur Dupin,so wonderful in their masterful force, their reticence,their quick dramatic point."

VOA: special.2009.02.02

Over the past few decades,however, scientists have determined that even trace amounts of lead in children's bodies leads to long-term neurological and behavioral problems.

VOA: standard.2009.12.19

"When the gas comes off the digester, it has not only methane in it it also has carbon dioxide And it has a trace of hydrogen sulfide."

VOA: standard.2010.02.23

At the same hearing, he says in one of the best studies used molecular fingerprinting to follow an outbreak of drug-resistant bacteria: "You actually can trace the specific bacteria around and they find that the resistant strains in humans match the resistant strains in the animals."

VOA: standard.2010.07.21