many, many thousands of years ago,
(when North America was nearly twice its present size)
what is now the North (formerly German) Sea was rich and fertile land
inhabited by hyænas...and humans
who did not deign to move westward
into what was then inhospitable land,
now the not-too-hospitable British Isles,
until the inundation.
Then came glaciation...
And, eventually, our little planet-warming civilisation.
But let us remember: 99% of all species
that have ever lived upon the earth
are long extinct.