100:00:04,170 --> 00:00:06,365Ross, when's this comet thing start?200:00:06,573 --> 00:00:10,236Well, technically, it started7 billion years ago.300:00:10,877 --> 00:00:13,675Okay. Fine, I'll stop.No teaching, okay?400:00:13,947 --> 00:00:17,508We'll just watch the pretty lightstreaking across the sky.500:00:17,784 --> 00:00:19,183Okay?6