The Wyoming Dinosaur Center paleontologists have presented a fossil that can help unravel the relationship between birds and dinosaurs. It is not yet clear whether the birds evolved or not from the dinosaurs, but the new fossil - the Dinosaurous troodontide - has revealed a little the way. The oldest fossil bird known so far is older than the possible bird ancestors. The newly presented dinosaur troodontide is, at least, the contemporary of the oldest bird.