The aftermath of the Great Flood.  The flood is directly linked to Genesis 6 and the mixing of kinds. And Matthew 24 is also directly linked to the great flood — it will be as in the days of Noah.

https://answersingenesis.org/the-flood/

https://www.icr.org/henry_morris/

https://store.icr.org/dr-henry-morris-the-genesis-flood-50th-anniversary.html