There are literally tens of thousands of blogs ranging from broad overviews of scientific breakthroughs to in-depth coverage of a specific scientific niche. Check out this lista of superiore, in alto 100 cutting-edge science blogs.
There's enough social networking sites out there for humans. This one is strictly designed for dogs! Yes, te read it correctly - for Cani :) And Cani can have their own blogs set up there as well.
Do te read Techcrunch, GigaOM, eHub, MOMB and all the other usual suspects? This page aggregates the most recente 10 headlines from all the superiore, in alto web 2.0 watchdogs. Very useful.