My first WAS as much a statement of substance as this nonsense:
Huge predators would have lurked in Tiktaalik's rivers and lakes, study co-leader Shubin saysperhaps one reason why Tiktaalik appears to have been headed for land.
Yea! I'm sure this creature was thinking "Gee, it's very vicious out here in the deep. I think I'll learn to grow mini-legs over the next several million years so I can take a look-see on land and see if it's safe. If so, I'll then spend another several million years morphing myself into a 'land critter'"
And you call that substative?