And now, Discovery News says, we know what he looked like – the early human ancestor who lived with the dinosaurs:
This ancestor, the first placental mammal, lived between 88.3 to 91.6 million years ago, according to the study, published in the latest issue of Biology Letters. Placental mammals today include humans and all other mammals except those that lay eggs or have pouches (marsupials).
The study counters prior research, based solely on fossil evidence, which theorized this “mother of all placental mammals” arose after the dinosaurs died out. The researchers instead believe that it preceded the non-avian dino die off and that we wouldn’t even be here if the dinosaurs were still around.
“If dinosaurs had not died out, then placental mammals may not have had the opportunity to diversify the way they did, and our own species would not have evolved!” added [Mario] dos Reis, a research associate in the Department of Genetics, Evolution and Environment at University College London.