“Megafauna are thought to have evolved to such large sizes to cope with inhospitable climates and food scarcity”
Pot induced thought perhaps....
A species grows to such large sizes because THEY ARE THRIVING!
Since when does “food scarcity” drive growth?
If their screwy theory held, the N. Koreans would be 10 ft. tall, rather than 4’ 9”.
Mega fauna would be a great name for a pet super store.