Perhaps the other species were a little shaggy, but today, there is a natural ecosystem that is little-changed from 10,000 years ago, and that's the Siberian tundra, especially near the arctic rim.
(a natural ecosystem; is; little-changed from 10,000 years ago) (that; 's; the Siberian tundra)
a natural ecosystem that
is 's
little-changed from 10,000 years ago
the Siberian tundra