Complex sentence: Awhile later, Gow Island's bird population becomes disturbed by something unknown; at the same time, the weather station's scientists try to figure out a connection between this event and a corrosive residue that begins turning up at various island locations.
Split into simpler sentences: Awhile later, Gow Island's bird population becomes disturbed by something unknown. At the same time, the weather station's scientists try to figure out a connection between this event and a corrosive residue that begins turning up at various island locations.