It's easy to take basic scientific discoveries for granted. The existence of DNA and micro-organisms, for example, or that living organisms change over time wer

It's easy to take basic scientific discoveries for granted. The existence of DNA and micro-organisms, for example, or that living organisms change over time were important discoveries. It wasn't that long ago when people didn't know about them. These are the types of things I meant. The mechanism by which they work is, of course, far less certain.