So, you’ll all recall the previous post where we looked at the absurdly broad neck base of the Upper Jurassic macronarian Camarasaurus . This time round we’re playing the same game, but looking up at the neck base of the diplodocoid Diplodocus , and again it is of course the Natural History Museum’s (London) mount of the Carnegie cast of D. carnegii (image © NHM). Note how elongate and narrow the centra are: the