Birds are the only living descendants. Many evolutionary biologists are starting to consider making birds a subset of reptiles and broadening it a bit. There are other animals likes sharks and alligators that coexisted with dinosaurs and have remained more or less the same, but you'd be hard-pressed to find a living velociraptor anywhere. This was kind of a useless question to be honest. The only answers you will get are:
>what you could have read on Wikipedia (what I just told you)
>a physically impossible theory with no evidence whatsoever (misinformation spread by idiots and people who like to hide things by method of diversion)
>word salad