I can't easily believe there aren't still new discoveries to be made. Every time in human history someone thought we were done with science wrong. I feel like we're getting to the point of saturation where there will be diminishing returns, but I doubt none. It was only "recently" that someone turned a children's toy and creativity into a low cost blood centrifuge. Putting the internet, and cameras in everyone's hands changes not just the potential tools and existing knowledge of people, but also serves to provide evidence of stories previously unbelievable.