Air & Space Magazine Natural Selection New Zealand foresters are perfecting a helicopter operation that alows them to preserve forests while they extract trees. Tom Harpole May 1997 Get our newsletter! Get our newsletter! You Might Also Like The Not-So-Big Dig November 1, 2006 Antonovs in America August 1, 2012 The People and Planes of Friday Harbor May 1, 2004 Frozen in Time January 1, 2006 Gear Heads January 1, 2000 Get the latest stories in your inbox every weekday. Email Powered by Salesforce Marketing Cloud (Privacy Notice / Terms & Conditions)