Not all dinosaurs may have completely gone extinct. Some may have evolved into birds. This is what scientists have hypothesized based on similarities between fossils and bird skeletons.
There is a new piece of evidence released in an upcoming issue of the journal Science suggesting birds did evolve from dinosaurs. Protein fragments taken from a T. rex fossil tested against amino acids in other animals revealed chicken amino acids compared most favorably.
Such a discovery is amazing, but not solely because such a large fearsome predator is connected to such scrumptious human prey. What is most amazing is that researchers were able to get the dinosaur protein out of a 68 million year old fossil. Previously, scientists thought proteins in fossils would be replaced by minerals within 1 million years.