You can either acquire knowledge through a library or just have a Saggitarius friend!

We Pisceans know how to swim without water

Correct." Kekrops sounded bitter, like he regretted his decision. "My people were the original Athenians--the gemini.""Like your zodiac sign?" Percy asked. "I'm a Leo.""No, stupid," Leo said. "I'm a Leo. You're a Percy.

Like the zodiac sign?' Percy asked. 'I'm a Leo.''No, stupid,' Leo said, 'I'm a Leo. You're a Percy.