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SABER-TOOTHED GAINT
MEGA CAT
In North America, the jaguar-size Smilodon gracilis was found mostly in what is now Florida and Pennsylvania; the slightly larger S. fatalis is best known from tar pit fossil beds in California. Those two species and the larger S. populator all roamed South America.
在北美，大部分美洲虎大小的纤细剑齿虎如今在佛罗里达和宾夕法尼亚被发现。人们从加州的焦油化石层中很好的了解了稍大一点的致命刃齿虎。这两个物种和较大的毁灭刃尺虎都在南美洲游荡。
Neck muscles pushed the head down to assist insertion of the upper canines.
（剑齿虎）的颈部肌肉将头部向下推，以辅助上犬齿刺穿（目标）。
HUNTING TECHNIQUE
Scientists once thought that Smilodon killed by knifelike stabs of its canines. But studies of the strength and length of its neck and muscle attachments have led to new theories.
科学家们曾经认为，剑池虎以匕首状的犬齿刺穿来捕猎。但是对它的颈部、肌肉附着的力量和长度的研究已经产生了新的理论。
With a smaller gape angle, the jaw muscles were then engaged and the mouth closed for the kill. A backward pulling movement tore the throat of the prey, leaving it to bleed out quickly.
（剑齿虎）在较小的张口角度下，下颚肌肉开始活动，随后嘴巴闭合，以进行捕杀。向后拉的动作撕裂了猎物的喉咙，使它很快流血。
配图来源 | National Geographic
原文作者 | Fernando G.Baptista & Patricia Healy
翻译 | 新译科技AI
编辑、排版 | 许嘉伦
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