Re:Very interesting... (Score 1)

Analysis of stromatolites from the Precambrian suggest that the length of a year was about 450 days. Precambrian is > 570 million years ago. If it took more than 570 million years to change the length of a year by less than 100 days, the only way the dinosaur extinction could be explained by a rapid change in the length of a year is by some catastrophic event forcing that change.