An article published in the journal “Scientific Reports” describes what appears to all intents and purposes a fight in which a mammal of the species Repenomamus robustus attacked a dinosaur of the species Psittacosaurus lujiatunensis. A team of researchers examined fossils discovered in today’s China dating back to about 125 million years ago, in the Jurassic period, which offer the first evidence of a mammal hunting a dinosaur. The two animals engaged in a mortal fight became entangled in a flow of volcanic mud similar to the one called lahar in jargon, leaving evidence of that fight.