Question: what are the biggest questions in science?
Answer: 1 What is the universe made of? Astronomers face an embarrassing conundrum: they don't know what 95% of the universe is made of. ... 
2 How did life begin? ... 
3 Are we alone in the universe? ... 
4 What makes us human? ... 
5 What is consciousness? ... 
6 Why do we dream? ... 
7 Why is there stuff? ... 
8 Are there other universes?