english: 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.
non_english: Op basis van dat principe keek hij om zich heen naar de verschillende bomen op Timberline. Hij realiseerde zich  dat sommige bristlecone-dennen in de White Mountains ruim 4.000 jaar oud waren.