the axe can deliver powerful blows in a single area, however it is firetrucking heavy
Printing Press
They had glass in ancient times, and continued to make it in the Middle Ages. In fact, there was a glass makers guild in Italy that may have predated the Middle Ages. They used glass to make stained glass windows in churches. They also invented spectacles during the Middle Ages, and there are medieval pictures of people using them for reading.
People of the Middle Ages did not know how to make concrete. The ancient Romans had concrete, but the secret of how to make it may have been lost. So there was a time from the middle of the fifth century for about 1300 years when no concrete structures were built. Even if the secret had been recorded, the fact that no one was using it meant it was lost for all practical purposes.
The lack of means to establish a ship's position in the open seas. There were primitve means for that and the Vikings had been good in using them, ennabling their ships to travel from Scandinavia to places like Iceland, Greenland and Newfoundland - and back to base. But the use of navigational instruments was not common elsewhere in Europe, causing most ships to stay close to the coast. This did not so much 'prevent' exploring, but it did limit its scope. The Portuguese for instance had been exploring ever further south along the west African coast during the Middle Ages.
It has no vowels until the Greeks made then.
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