Complex sentence: In 1829, the British Naval Expedition to the South Atlantic under the command of Captain Henry Foster in stopped at Deception Island, where it conducted a topographic survey and some scientific experiments, particularly pendulum and magnetic observations.
Split into simpler sentences: In 1829, the British Naval Expedition to the South Atlantic under the command of Captain Henry Foster in stopped at Deception Island. The expedition conducted a topographic survey and scientific experiments, particularly pendulum and magnetic observations.