Complex sentence: The protective capabilities of the sky were only discovered in the 19th century, yet the Qur'an states the following: and (that) We have set up the sky as a canopy well-secured ?
Split into simpler sentences: The protective capabilities of the sky were only discovered in the 19th century. The the Qur'an states the following: and (that) We have set up the sky as a canopy well-secured?