Similar to the laser, DNA technology has found uses very far afield from its original discovery. I wonder when (not if) the next such discovery will come or if it is already here and we just don't recognize it YET. Personally, I still have hopes for 'cold fusion' but that has a way to go yet!
Ya. Discoveries are often right in plain sight.
I am peronally interested in more recent information such as being able to trace my ancestory back 1000 + years.
Also, if you go back far enough, it all traces back to an origin. A single person (mother or father) or a small group of people — Adam and Eve. Reminds us that we are all related and have a common ancestor.
Fusion. They can’t seem to make it work (cold or H-He). IMO Fusion is necessary for the next step for humanity. Like steam power was to the industrial revolution. Massive amounts of cheap energy. Heck, we are going to need lots of power if we are all going to be driving electric cars. It’ll also come in handy for space travel.