Researchers from the Complutense University of Madrid and the Universitat Autònoma de Barcelona identified in Lleida a series of dinosaur eggs with a unique characteristic: they are oval in shape. The discovery represents proof in favour of the hypothesis that birds and non avian theropods, dinosaurs from the Cretaceous Period, could have a common ancestor.

The ancient bones of newborns are very useful to recover the ancient DNA of the bacteria causing syphilis, the Treponema pallidum pallidum.