We are not YET advanced enough to bring T-Rex back, out of some genetic material. Actually, better to put it in words, we are not yet advanced enough to bring back even mammoth, even they found one quite perserved in ice in Siberia.
I don't know how far did their resarch go. I know they were trying to get them back to life with use of elephant.
But soon I believe that we will be able to do such things, maybe even create new races of spicies, which makes us equal to someone from the religious books....
