肖海姆和罗杰斯坚信冰冻是最完美的理由。
Shoham and Rogers believe that ice provides a perfect explanation.
肖海姆说，“这种现象可能会定期发生，远非我们所看到的那样。”
"This phenomenon may take place regularly," Shoham said, "far beyond what we witness."
肖海姆说，一些病毒在其宿主产生了抵抗力时，也许已经进化出许多另类病毒蛰伏于冰中。
Many other viruses may have evolved to lay dormant in ice when their host populations develop resistance, says Shoham.
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