https://fb.watch/kTDV7-yoOm/?mibextid=Nif5oz
This is cool video on polyploid
Not sure that link is good. Best to go to pbs site or search for "How (some) plants survived the K-PG extinction"
The series is superb. Fun to watch and very informative.
https://www.youtube.com/watch?v=4XmFUWdgKWk