A feathered flying dinosaur the size of a cat is the first that has been proven to eat mammals by scientists. Palaeontologists in the UK have analysed fossil remains from around 120 million years ago, showing a small, feathered dinosaur – known as Microraptor – with the foot of an animal inside its ribcage. The experts said their findings, published in the Journal of Vertebrate Paleontology, is “the first record of a dinosaur eating a mammal”.