Does Quran clarify everything?

Question is: Allah (swt) says in the Qur’an {And We have sent down upon you the Book as a clarification for all things} [Surat Al-Nahl 89]. The verse says that Allah sent down the Qur’an to clarify everything, and I do not find everything in the Qu’ran. If the Qur’an clarifies everything, then where is the bacteria in Qur’an? Where is the train in Qur’an? Where are the particles of wood in Qur’an? Those are things, and Qur’an clarifies everything!