[LEFT][I][SIZE=14px][FONT=Georgia][COLOR=#000000] [/COLOR][/FONT][/SIZE][/I][/LEFT] [QUOTE] [LEFT][I][SIZE=14px][FONT=Georgia][COLOR=#000000][I]"And after many generations of this grouping behaviour, there are new selective pressures on their [skull shape]," said the researcher.[/I][/COLOR][/FONT][/SIZE][/I][/LEFT] [LEFT][I][SIZE=14px][FONT=Georgia][COLOR=#000000][I]This pressure meant that animals with larger teeth and stronger jaws were more likely to succeed in hunting, and to survive to pass on their large-toothed, strong-jawed genes to the next generation.[/I][/COLOR][/FONT][/SIZE][/I][/LEFT] [LEFT][I][SIZE=14px][FONT=Georgia][COLOR=#000000][I]"They developed strength in their muscles – especially the muscles that close their mouth," said Dr Munoz-Doran.[/I][/COLOR][/FONT][/SIZE][/I][/LEFT] [LEFT][I][SIZE=14px][FONT=Georgia][COLOR=#000000][I]"And bones that are more resistant to bending, so they could support the mechanical strains of biting the prey.[/I][/COLOR][/FONT][/SIZE][/I][/LEFT] [LEFT][I][SIZE=14px][FONT=Georgia][COLOR=#000000][I]"Over time, they became adapted to be ‘hypercarnivorous’."[/I][/COLOR][/FONT][/SIZE][/I][/LEFT] [LEFT][I][SIZE=14px][FONT=Georgia][COLOR=#000000][I]The researcher pointed out that domestic dogs had "very good evolutionary reasons to enjoy chewing a bone".[/I][/COLOR][/FONT][/SIZE][/I][/LEFT] [LEFT][I][SIZE=14px][FONT=Georgia][COLOR=#000000][I]"They have the tools to do that," he told BBC Nature, "and they want to use their tools."[/I][/COLOR][/FONT][/SIZE][/I][/LEFT][/QUOTE][LEFT][I][SIZE=14px][FONT=Georgia][COLOR=#000000][/COLOR][/FONT][/SIZE][/I][/LEFT] [url]http://www.bbc.co.uk/nature/18767817[/url]
