Mastodon hunting in early Americas

When did people first get to North America? The long-held theory that pre-Clovis people came no earlier than 12,000 years ago has hung on way too long (I never liked it, but no one cared what I thought.) Anyway, a mastodon tusk found near Seattle and penetrated by a spear point has been dated to 13,800 years old. If people ad reached that far south, they came over earlier than thought. Frankly, I think we'll keep pushing this date back. I would not be surprised if, in another 20 years, the textbooks will start the peopling of the Americas over 30,000 years back.