Complex sentence: It is common for other members of a pod, including uncles such as Orcan to babysit young killer whales, and Luna might have been travelling with Orcan away from the rest of the pod when Orcan died.
Split into simpler sentences: It is common for other members of a pod, including uncles such as Orcan, to babysit young killer whales. It was speculated that Luna might have been travelling with Orcan away from the rest of the pod when Orcan died.