The Earth is an egg!
Actually, moron, humans have known the earth was round as far back as the ancient Greeks (Aristotle guessed it was the circumference of 400,000 stadiums). The guy who got it the most right was actually Eratosthenes who used simple sticks and the shadows they cast to calculate this. It wasn’t a religion that guessed the property of the Universe: it was simple science! Turns out this knowledge pre-dates your useless book of mythology.
As for the Koran claiming that salt and fresh water can’t mix; has any fucking Muslim even tested that out to discover how utterly wrong it is? That’s what you do in science: you test shit instead of just conjuring it up from your head and declaring that God willed it so.