Surfactant prevents this collapse by reducing the surface tension of the fluids that line the lungs and helping to equalize the pressures between large and small air spaces. Surface tension is a measure of the attraction molecules of a fluid have for each other.
Buffalo Bill Cody, who later became famous for his Wild West Show, was a rider for the Pony Express and wrote of his experiences. We join Bill's story as he is hired - at the age of 15 - to ride a section of the trail that lies in modern-day Wyoming:
One manâs flea market find could be auction treasure! A North Carolina attorney named Frank A. Abrams believes heâs in possession of a rare tintype that shows famed outlaw Billy the Kid with Pat Garrett, the sheriff who killed him in 1881. âIf Iâm right, this will be the only known picture of Billy the Kid with Pat Garrett,â Frank A. Abrams told the Albuquerque Journal. Abrams bought the picture in NC in 2011, and recently traveled to Arizona to attempt to substantiate his claim.