The world's largest known plant has been discovered off the coast of Western Australia.
The plant, a seagrass, is 180 km (111 miles) long and thought to be around 4,500 years old.
The world's largest known plant has been discovered off the coast of Western Australia.
The plant, a seagrass, is 180 km (111 miles) long and thought to be around 4,500 years old.