Edmund Schulman in the 1950s had been studying trees under great stress at Timberline, and came to the realization that he put in an article in Science magazine called, "Longevity under Adversity in Conifers." And then, based on that principle, he started looking around at the various trees at Timberline, and realized that the bristlecone pines -- he found some in the White Mountains that were over 4,000 years old.
Edmund Schulman, in anii 50 a studiat acei copaci care se aflau sub presiune in conditii adverse si si-a dat seama ca ca ii poate prezenta intr-un articol, in revista "Science", articol intitulat " Longevitatea coniferelor in conditii adverse" Pe baza acestui principiu a inceput sa studieze diversi copaci aflati in teritorii adverse si si-a dat seama ca pinul-arici...- a descoperit in Muntii Albi astfel de pini batrani de mai bine de 4 mii de ani.