why dinosaur became extinct

送交者: pgss 于 2015-04-29, 09:17:38:

The typical explanation is that they are too large. But there are very small dinosaur as well. And large snake and Crocs survived.

I am pretty sure Tye alvarez meteorite theory is wrong, or flawed.

they became birds (无内容) - meiyou (0 bytes) 2015-04-29, 09:31:25 (778318)
- （some of them became bird...how about ALL the others?) (无内容) - pgss (0 bytes) 2015-04-30, 09:36:35 (778396)
- the problem is not a single trace remains - pgss (58 bytes) 2015-04-29, 10:40:10 (778321)