I was sad to read that Scirus is being retired next year (2014).
Scirus is one of the most comprehensive and oldest science search engines, plus it has the added advantage of having an Advanced search option. If you haven’t ever used it, it’s worth visiting before it disappears.
Where to go for science searching instead?
Well, a useful starting point is a page of open access (i.e. free) science resources kindly provided by the Special Libraries Association (SLA). As they say, the demise of Scirus will be a significant loss, but this is a useful page.
They are missing a few though. To their list I would add:
SciCentral for news and literature sources
Scientific.net for materials science and engineering (also has an advanced search option)
The simply named Science Research which is in beta
The science news site E! Science News
The British Library‘s vast collections (also with Advanced search option)
Google Scholar shouldn’t be ignored either
There we are, we’ll get by. I will post other useful sites when I find them.