也门人习惯咀嚼一种叫跨特的树叶，这种树叶是温和的兴奋剂，对清晰的思考和力本说没有助益，这个习惯几乎和以往一样普遍。
And the Yemeni habit of chewing a leaf called qat, a mild stimulant not conducive to clear thinking or dynamism, is almost as pervasive as ever.
本兹说，发生一次7级左右的余震的可能性非常大。而这样的余震可能会有较大的破坏力。
"There's a significant probability of having an aftershock in the magnitude 7 range," which could be potentially destructive, says Dr. Benz.
本德尔说，袋鼠用脚拍地的声音具有威慑东部灰袋鼠的潜在力，由于它是自然声音，因此它不大可能因被袋鼠适应而逐渐丧失威慑作用。
"The foot thump shows potential as a deterrent of eastern grey kangaroos. And is less likely to suffer from habituation because it is a natural sound," bender said.
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