http://jqibjq5jntgr7n3u5rhhzp5y6x3cv2erg3xqnkqe5bbchfaanw6ftvad.onion/myths.html
Tor is encrypted, in fact it uses 3 layers of encryption. When you connect to an onion site, the encryption is even more effective because the traffic stays encrypted using Tor all the way to its destination. However, most sites use HTTPS anyway, so this isn't even an issue.