english: Well, because he looked around himself and he saw all these fabulous physicists that created quantum mechanics and modern physics, and they were all in their 20s and early 30s when they did so.
non_english: Çünkü etrafında kuantum  mekaniğini ve modern fiziği yaratan ünlü fizikçiler vardı ve hepsi 20'li yaşlarda veya 30'lu yaşların başındaydılar.