Step 1. write a story about European explorers. Step 2.add humor.
A. reverential isn't branch of government
The 25 000 is a good tip: what happened then?
It was the time of the last Glacial Maximum (Ice age). So either the Bering Strait was frozen over at the time, or the sea water was lower because so much water was taken up by the glaciers (or, most likely, a combination of the two).
The Olmec civilization emerged out of south-central Mexico in the tropical lowlands. Today, this area is the modern Mexico states of Veracruz and Tabasco. The Olmec are considered to have been at their height as a civilization from about 1500 BCE to approximately 400 BCE.