Complex sentence: Thyborøn Canal was created through the center of Aggertange by another flooding in 1862, and Agger Canal began to be filled with sand, and it was eventually closed in 1877, thus making the island a little bit larger.
Split into simpler sentences: Thyborøn Canal was created through the center of Agger Tange by another flood in 1862, and Agger Canal began to fill up with sand. It was eventually closed in 1877, thus making the island a little bit larger.