The aim of this extraordinarily complex study was to mimic the different phases of the flight of birds.
Leonardo also designed a wide variety of artillery weapons.
A circular, domed, portable tent covered by felt, typically used by nomadic peoples.
Karst formations include dolines and dripstones.
Bin lorries play an important role in the life of towns and cities.
A colourless, odourless, non-reactive gas, it constitutes 78.1% of Earth´s atmosphere.
Colourless, odourless, heavier-than-air gas. Necessary for the photosynthesis of plants.
Colourless, odourless gas, highly toxic to humans and animals in high concentration.
A colourless, odourless gas, an important component of the atmosphere, indispensable to sustain terrestrial life.