#Google is so powerful that it hides other search engines from us. We simply do not know about the existence of most of them.

Meanwhile, there are still a large number of excellent search engines in the world that specialize in books, science, and other smart information.

Here a list of sites you’ve might never heard of:

  • www.refseek.com is a search engine for academic resources – More than a billion sources
  • www.worldcat.org search the content of 20,000 global libraries.
  • https://link.springer.com – access to more than 10 million scientific documents: books, articles,
  • www.bioline.org.br -is a library of published bioscientific journals
  • http://repec.org – Volunteers from 102 countries collected nearly 4 million publications
  • www.science.gov -is a U.S. government search engine for more than 2200 scientific sites.
  • www.pdfdrive.com -is the largest website for free download of PDF books. Claim more than 225 million titles.
  • www.base-search.net -is one of the most powerful search engines for academic research texts. More than 100 million scientific articles, 70% of which are free