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The bacterial disease known as the bubonic plague is one of the deadliest infectious diseases in the history of mankind.
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Bacteria occur in a wide range of shapes, including spheres, rods and spirals.
Medieval townhouses were built from stone or brick and were several stories high.
Bacteria are unicellular organisms that have no cell walls and are a few micrometers in length
Clothing reflects the lifestyle and culture of the region's inhabitants.
A wide variety of torture devices were in use in medieval dungeons.
In the Tudor Era around 200 buildings were built on the bridge across the River Thames.
Keeps were typical buildings in the Middle Ages, also built independently from castles.
There are two basic cell types: prokaryotic and eukaryotic cells.
Viruses consist of protein and DNA or RNA, they reprogram infected cells to produce more viruses.
Numerous legendary empires were built (and destroyed) in the course of history.