"Hard" science fiction book I would have read in the 80s involving humans going on a prolonged space journey to a distant star. The trip would be at near-light speed, not FTL and take decades. However, due to time dilation etc.. when they arrive at their destination they find 100s of years have passed, and humans have already been there for years. This may have just been part of the book rather than the whole story.
The particular point I remember was that the more advanced humans found the earlier space travellers particularly smelly.
The particular point I remember was that the more advanced humans found the earlier space travellers particularly smelly.