Are there theories about this phenomenon? Does this explain the historically atypical size of the dinosaurs? Why doesn't it continue to happen? For example, why aren't there giant robins (birds) or tiny ones? Is there not a single eco-system ever where this would be an advantage?
From another article on the same discovery
Humans tend to exterminate them.
Of course if they had survived to even antiquity, yes, we’d probably have hunted them to extinction.
> Of course if they had survived to even antiquity, yes, we’d probably have hunted them to extinction.
Often it wasn't even hunting. New Zealand's various giant ground parrots weren't THAT delicious. We introduced invasive species which did the extermination for us, in that case (and many/most bird-y cases, at least).
I imagine deep-sea is an ecosystem that doesn't get disrupted often. Little new introduction of species. Little human intervention.