The article discusses the largest big cat species, both extinct and current, as shared by members of the Reddit community r/bigcats. It highlights notable species such as the Smilodon populator and the Siberian tiger, detailing their weights and features while noting the complexities in categorizing size among various subspecies.

The article discusses various big cat species, highlighting the largest known species both extinct and current, including the Smilodon populator, American lion, Siberian tiger, and liger. It emphasizes the complexities in determining the largest big cat due to size variability and extinct species estimates, while also suggesting relevant Reddit communities for further discussion.