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Research says climate amountanimalschangeclearlydistanceselbowsevolutionaryfartherfewerforestshabitsharderlongermillionpawspreyshapespeciestoday changed dogs from amountanimalschangeclearlydistanceselbowsevolutionaryfartherfewerforestshabitsharderlongermillionpawspreyshapespeciestoday resembling cats to how they look amountanimalschangeclearlydistanceselbowsevolutionaryfartherfewerforestshabitsharderlongermillionpawspreyshapespeciestoday. Researchers say that 40 million years ago, dogs ambushed their amountanimalschangeclearlydistanceselbowsevolutionaryfartherfewerforestshabitsharderlongermillionpawspreyshapespeciestoday like cats. The changing climate reduced the amountanimalschangeclearlydistanceselbowsevolutionaryfartherfewerforestshabitsharderlongermillionpawspreyshapespeciestoday of amountanimalschangeclearlydistanceselbowsevolutionaryfartherfewerforestshabitsharderlongermillionpawspreyshapespeciestoday in North America, so the amountanimalschangeclearlydistanceselbowsevolutionaryfartherfewerforestshabitsharderlongermillionpawspreyshapespeciestoday and amountanimalschangeclearlydistanceselbowsevolutionaryfartherfewerforestshabitsharderlongermillionpawspreyshapespeciestoday of dogs changed. New grasslands meant dogs had amountanimalschangeclearlydistanceselbowsevolutionaryfartherfewerforestshabitsharderlongermillionpawspreyshapespeciestoday places to hide to ambush their prey. They changed their hunting styles and grew amountanimalschangeclearlydistanceselbowsevolutionaryfartherfewerforestshabitsharderlongermillionpawspreyshapespeciestoday legs.

Scientists looked at how dogs changed by looking at the amountanimalschangeclearlydistanceselbowsevolutionaryfartherfewerforestshabitsharderlongermillionpawspreyshapespeciestoday and teeth of amountanimalschangeclearlydistanceselbowsevolutionaryfartherfewerforestshabitsharderlongermillionpawspreyshapespeciestoday that lived up to 40 amountanimalschangeclearlydistanceselbowsevolutionaryfartherfewerforestshabitsharderlongermillionpawspreyshapespeciestoday years ago. The dogs' amountanimalschangeclearlydistanceselbowsevolutionaryfartherfewerforestshabitsharderlongermillionpawspreyshapespeciestoday and teeth amountanimalschangeclearlydistanceselbowsevolutionaryfartherfewerforestshabitsharderlongermillionpawspreyshapespeciestoday showed amountanimalschangeclearlydistanceselbowsevolutionaryfartherfewerforestshabitsharderlongermillionpawspreyshapespeciestoday change. Dogs used to have elbows like those of cats. The front amountanimalschangeclearlydistanceselbowsevolutionaryfartherfewerforestshabitsharderlongermillionpawspreyshapespeciestoday swivelled so they could grab their prey. Elbows changed in dogs to let them run amountanimalschangeclearlydistanceselbowsevolutionaryfartherfewerforestshabitsharderlongermillionpawspreyshapespeciestoday. This meant they could chase their prey over long amountanimalschangeclearlydistanceselbowsevolutionaryfartherfewerforestshabitsharderlongermillionpawspreyshapespeciestoday. The teeth in dogs became amountanimalschangeclearlydistanceselbowsevolutionaryfartherfewerforestshabitsharderlongermillionpawspreyshapespeciestoday so they could hold on to prey.