english: So you could really say that researchers trying to understand the cause of disease without being able to have human stem cell models were much like investigators trying to figure out what had gone terribly wrong in a plane crash without having a black box, or a flight recorder.
non_english: Insan kök hücre modelleri olmadan hastalığın sebeplerini araştıran bilim adamlarını, bir uçak kazasında neyin yanlış gittiğini kara kutu yada uçuş kayıt cihazı olmadan araştıran dedektiflere benzetebilirsiniz.