I can't post this under "Single Videos" because there's no 'reply' facility:
I marvel at the ingenuity, workmanship and knowledge that was available in the Ancient World. In 1901 a device was found close to a wreck off the Greek island of Antikythera. It was covered in the concretions of 2,000 years under the sea and no one was quite sure what it was or how it had been made. Tomography finally revealed the inside of the device.
If I marvel at the knowledge of the Ancients, I also applaud the guy from Apple & his use of Lego in creating a replica of this amazing device - which does a lot more than they though in 1901!