Meanwhile, Rogers and John Castello of State University of New York in Syracuse have isolated a plant virus called tomato mosaic virus from Greenland glacial ice up to 140,000 years old.

• 罗杰斯称这种进化策略为“基因组的回收利用”。他认为，迁徙水鸟定期将病毒送到北极冰河和冰湖中，病毒在那里冻入冰中。