This article confuses me. Why does it make the scientists out to be on opposite sides of the aisle? A giraffe that wins a neck to neck fight is also one that may have better chances of finding food high up a tree when resources are scarce - both can lead to better survival and hence passing of genes. It's not one or the other, it can can be both.
I used to live in Tanzania and over there, the trees are mostly shorter than the giraffes, but I'm sure they reach up to eat sometimes. I guess my point was that giraffes didn't evolve long necks to eat.
