Complex sentence: However, it also appears from genetics that the modern Asiatic lion separated from its African cousin around 100,000 years ago, meaning that the modern lion migrated to Eurasia, long before the cave lion's extinction there.
Split into simpler sentences: However, it also appears from genetics that the modern Asiatic lion separated from its African cousin around 100,000 years ago. In other words, the modern lion migrated from Africa to Eurasia, long before the cave lion's extinction there.