Four dinosaur eggs identified in Coll de Nargo

The journal Cretaceous Research is publishing an article which recognizes four different dinosaur eggs (oospecies) in the Coll de Nargó area (Lleida Province, south-central Pyrenees). The research proves the coexistence ...

Tax evaders prefer institutional punishment

(Phys.org) -- Selfish behaviour is a threat to successful coexistence and mutual cooperation. In many cases this human cooperation is based on punishing those who do not cooperate. There can be two different forms of punishment ...