原文已被隐藏，你可用 快捷键 - 或点击 显示原文 按钮来查看原文
第1段
1 .This is Scientific American's 60-Second Science. I'm Karen Hopkin. This'll just take a minute.
该句暂无译文！
2 .When you think about dog food, you probably picture more meat than potato.
该句暂无译文！
3 .But a new study finds that, unlike wolves, dogs have genes that allow them to digest starch.
该句暂无译文！
4 .That evolutionary adaptation may have helped fuel their domestication.
该句暂无译文！
5 .The report is in the journal Nature.
该句暂无译文！
6 .Dogs and wolves hail from a common canine ancestor.
该句暂无译文！
7 .And though you can still see a strong resemblance, many traits distinguish the two today.
该句暂无译文！
8 .Wolves have larger teeth and skulls than dogs do.
该句暂无译文！
9 .And they're far less likely to bring you your newspaper and slippers.
该句暂无译文！
10 .To figure out how such differences might have evolved, researchers compared the DNA of a dozen wolves and 14 different dog breeds, from cocker spaniels to German Shepherds.
该句暂无译文！
11 .And they found 36 places where the dogs' genes stray from those of the wolf.
该句暂无译文！
12 .Some of these genes have to do with the brain, but a surprising number help pooches process carbs.
该句暂无译文！
13 .That metabolic trick may have made it easier for dogs to stomach hanging around with humans, particularly once people started farming.
该句暂无译文！
14 .The leftover grains in the scrap heap may have attracted animals that, over time, evolved an ability to carbo-load.
该句暂无译文！
15 .And ultimately convinced them to stay.
该句暂无译文！
16 .Thanks for the minute, for Scientific American's 60-Second Science. I'm Karen Hopkin.
该句暂无译文！