Paleontology
Theropod Dinosaurs and the Origin of Birds

The prosauropods were the largest herbivores of their time, and the largest herbivores in earth's history up to that point.

Edit: I saw this dino in an online course, if anyone is interested: https://www.coursera.org/learn/theropods-birds

And for anyone interested in feathered dinosaurs (such as the one in that article), here's a cool web course, done partly by one of the discoverers of said tail :)

Coursera offers four free courses hosted by the University of Alberta:

Dino 101: Dinosaur Paleobiology https://www.coursera.org/learn/dino101

Paleontology: Theropod Dinosaurs and the Origin of Birds https://www.coursera.org/learn/theropods-birds

Paleontology: Ancient Marine Reptiles https://www.coursera.org/learn/ancient-marine-reptiles

Paleontology: Early Vertebrate Evolution https://www.coursera.org/learn/early-vertebrate-evolution

Try this. https://www.coursera.org/learn/theropods-birds

I followed 3dino courses on cousera last year. Best thing happened to me last year. 3rd course is,Paleontology: Theropod Dinosaurs and the Origin of Birds.

https://www.coursera.org/learn/theropods-birds

There's an interesting free online course on the evolution of Theropods that recently started. I've gone through the first lesson, and I think it'll be helpful for many people here, since it goes beyond what is taught in schools, but is still approachable to the general public. https://www.coursera.org/learn/theropods-birds

Well, birds diverged from dinosaurs quite far up the tree from T-rex (later is what I mean) so an ancestor of both would have been much closer to T-rex chronologically and in how it looked. There’s a free online course on the evolution of birds from dinosaurs here. Basically, the actual first bird is WAY higher up the tree than you would think. There are lots of very bird-like animals that are not considered true birds but would be hard to tell apart from them without knowing enough about the subtle differences in their skeletal structure and stuff like that. The evolution of birds was realllllly slow and gradual so the answer won’t be as cut-and-dry as you may hope for, and we may never know as scientists debate what makes a bird a bird and try to find evidence of when those features has just arisen.

If online learning's your thing, the University of Alberta offers a few online palaeontology courses via Coursera that's geared towards general adult levels. Being based in Alberta dinosaurs are very obviously the most popular ones, but the other courses are pretty up to snuff. No mammals or invertebrate stuff though.

Courses offered:

- Dino 101: Dinosaur Paleobiology (https://www.coursera.org/learn/dino101) 

- Paleontology: Theropod Dinosaurs and the Origin of Birds (https://www.coursera.org/learn/theropods-birds)

- Paleontology: Marine Reptiles (https://www.coursera.org/learn/ancient-marine-reptiles)

- Paleontology: Early Vertebrate Evolution (https://www.coursera.org/learn/early-vertebrate-evolution)