Lifting machinery of the time
Lifting machines can be divided into two groups: complex and simple. The complex ones were born later and are so…
Lifting machinery: levers
Archimedes was one of the most important scholars regarding the levers and the conditions of equilibrium of bodies. If two…
Territory: changes caused by epidemics
Over the centuries, Europe, and beyond, has been hit by numerous epidemics of varying intensity, such as the Black Death…
The spread of Sars-Cov2
The virus is transmitted by air, through droplets produced by the breath or simply by talking or coughing. Sometimes the…
Medicines against Sars-Cov2
There are no specific medicines to treat SARS-CoV-2 infection despite the fact that the COVID-19 pandemic has been underway for…
The variants of Sars-Cov2
New variants of the coronavirus have been identified around the world The variants represent a natural evolution of the virus.…