Lars Schmitz has posted this article to his blog today, and it may change our perception of dinosaurs and their noctural vs. diurnal nature.
Nocturnal Dinosaurs?
And here's the piece from a more layman perspective over at the BBC News Science site.
Dinosaurs were Active Both Day and Night, Study Claims
Either way, the study gives new insight into the diurnal versus nocturnal dinosaur debate, and the subject certainly bears watching in future.