Do you have a question for a scientist featured in the latest episode of Frontiers? Here's your chance to stand in Alan Alda's shoes. Click on a scientist's name below to read a brief bio and to e-mail your question. A selection of answers will be posted online.

Please e-mail your questions by December 12, 2000.

Philipe Afriat		Team physician for the record-breaking deep divers in "No Limit."
Frank Felberbaum		Teaches his methods for improving memory with prize-winning results in "Memory Marathon."
Peter Bartsch		Tries to predict who will succumb to altitude sickness in "High Anxiety."
Jerry Linenger		Recounts his thrilling and often harrowing journey aboard MIR in "I Was a Spaceman."