Understanding the K-Pg Event's Impact on Mammalian Evolution

The K-Pg (Cretaceous-Paleogene) extinction event was a pivotal moment in Earth’s history, dramatically altering the course of mammalian evolution.

1. Mass Extinction: The K-Pg event, triggered by an asteroid impact, wiped out around 75% of all species, including non-avian dinosaurs. This created ecological niches that mammals could exploit.
2. Biodiversity Boom: Freed from competition with the dominant dinosaur species, mammals diversified rapidly in size and habitat preferences. Small mammals thrived as they filled various niches left vacant by extinct dinosaurs.

Pro tip: Understanding this event helps explain why mammals became such diverse and adaptable creatures today.