Complex sentence: This ability arose with the evolution of behavioral modernity in humans around 50,000 years ago, and is often thought to be unique to humans, although some other species have demonstrated similar, though much less complex, abilities for social learning.
Split into simpler sentences: This ability arose with the evolution of behavioral modernity in humans around 50,000 years ago. This capacity is often thought to be unique to humans, although some other species have demonstrated similar, though much less complex, abilities for social learning.