Word for someone who is extremely up-to-date with the latest facts (news or research)


I seek a word for one who is up-to-date, enlightened, and extremely well informed about the latest developments or research in a particular field.


An example is a person who complains about a recent encyclopedic book publication, criticising it for being out-of-date despite its recent publication date. I want to be somewhat ironic and say something about his or her obsession with "up-to-date-ness" and his failure to appreciate this truly magnificent book. Any suggestions?




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