Our results raise the possibility that a biosphere could have arisen on Earth 400 million years earlier than is now thought,Harrison said. But it's not a smoking gun.
Our results raise the possibility that a biosphere could have arisen on Earth 400 million years earlier than is now thought,Harrison said. But it's not a smoking gun.
我们的结果提高了生物圈比我们现在想象的更早的4亿年出现在地球上的可能性,哈里森说。但它不是一只烟枪。