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Feeling left out of the social networking revolution? There are many ways you can get involved. If MySpace () or Friendster (), two of the most popular networking sites, don’t sound your cup of tea and you’re too old for Bebo (, mainly for teenagers) and Facebook (, for students – though it does have a business arm), you could try one of the more specialised sites. If you work in the life sciences, go to to chat to others in the field about everything from algal blooms to zebrafish. There’s a global community of photographers at , and…