As the NOVA crew films, Dr. Peter Hackett takes blood samples of climbers. Dr. Hackett is currently investigating Acute Mountain Sickness on a cellular level. Previous | Next | Return to Gallery Photo: Kent Harvey Climb | Expedition | Mountain of Extremes Denali for Kids | Dispatches | E-Mail | Resources Site Map | Surviving Denali Home Editor's Picks | Previous Sites | Join Us/E-mail | TV/Web Schedule About NOVA | Teachers | Site Map | Shop | Jobs | Search | To print PBS Online | NOVA Online | WGBH © | Updated November 2000