getting to reveal the truth about something. we often believe something to be true, but science lets you establish if that belief is really right. In fact the most exciting bit is when things you find things you thought to be true not to be the case, as that is what you makes rethink things. Never be afraid to change your ideas!
I think the most exciting thing is making discoveries. Every time we run an experiment, we learn something new, even if that “something” is that we need to adjust our design and run some more studies to improve our test! We’re constantly learning, and wondering how to go forward with our questions.