These Verses explain we must gain knowledge of sciences.
6:38 (There are signs in the Universe to behold.) There is not an animal on the earth, nor a flying creature flying on two wings, but they are communities like you. We have omitted nothing in the Book (that was essential to be given through revelation.) Then to their Lord they will be gathered.
29:43 Such are the examples We cite for mankind, but only men and women with knowledge of sciences will make best use of their intellect.
35:28 And of human beings, the crawling creatures and related animals, and the cattle have diverse colors and properties. This is why of all His servants only those with knowledge of sciences can get some idea of the glory of God (by examining the wonders in nature). Surely, God is Almighty, Absolver of imperfections.
Dawwab = Crawling creatures and insects. Ulama = Scientists = Men and women of scientific knowledge. The above two verses clearly define ‘Ulama’. Please reflect how many sciences are mentioned here: Meteorology, Water Cycle, Botany, Geology, Topography, Anthropology, Human soma and psyche, Biology, Zoology, Nematology, Parasitology, Livestock, Nutrition etc! The term does not apply to clergy (Mullahs) who can only tell about petty rituals, things such as which side to sleep on and not to sleep on, prayers to recite when you wake up or step in and out of home, how to rinse your nose and mouth, do wudhu or wash the private parts]