Simplify the following text for a Grade 6 native English-speaking person.
Original: A chance discovery by a road worker in 1956 uncovered a rich find of 360 million year old fish fossils , dating from the Devonian period in the Paleozoic era .
Simplified: A road worker in 1956 found 360 million year old fish fossils . These were from the Devonian period in the Paleozoic era .