Ok are you ready?  Check out this update and be prepared to be blown away:

The Antikythera Mechanism has about 14,000 characters of text on its mangled, time-weary body. Since its discovery over 100 years ago, very little of that text was readable, only a few hundred characters.

Now, the team behind this effort confirms that the mechanism was an astronomical calendar. It showed the position of the planets, the position of the Sun and Moon in the zodiac, the phases of the Moon, and it also predicted eclipses.

WHoa!  Can you imagine a device that sophisticated and capable of all those things from such a long time ago?  That is certainly impressive and most people would have thought a civilization during that time would not be able to make something like that.

Image credit: wikimedia

thanks to universetoday.com for the great info