Prehistoric Seas

noun a word that represents a person, place, thing, or idea. In this case, 'Panthalassic Ocean' is a specific body of water on Earth.

article a word that specifies a noun. In this case, 'the' is a definite article used before 'Panthalassic Ocean' to indicate a specific ocean.

• The Panthalassic Ocean was the largest ocean in Earth's history, covering most of the supercontinent Pangaea.
• Back in the day, the Panthalassic Ocean was like the biggest swimming pool ever.
• The Panthalassic Ocean was lit, man. It was huge!
• The Panthalassic Ocean was like a giant blue blanket wrapping around Pangaea.