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Neurons transmit electrical signals via chemical and electrical synapses.
This animation demonstrates the fine molecular structure and mechanism of muscles.
The intriguing history of this historic castle spans nearly a thousand years.
In mountainous areas the climate, soil properties, the flora and fauna change depending on elevation.
We can travel on dual carriageways on the motorway.
An earthquake is one of the most devastating natural phenomena.
The three types of muscle found in the human body are the smooth, the striated and the cardiac muscle.
Yuri Gagarin became the first human in space on 12 April 1961.
The New Horizons space probe was launched in 2006, with the objective to study Pluto and the Kuiper Belt.
Humans have 4 types of teeth: incisors, canines, premolars and molars.
Systemic circulation carries oxygenated blood from the heart to the body, while pulmonary circulation carries oxygenated blood from the lungs to the heart.
This physicist-inventor and electrical engineer who mainly dealt with electrotechnics was undoubtedly one of the most brilliant figures of the second...
Eukaryotic cells with nuclei measuring only a few micrometres may contain nearly 2 metres of DNA, coiled multiple times.
The Wright Flyer was the first successful powered, heavier-than-air aircraft, designed and built by the Wright brothers.
A widespread snail species, also popular as food.
Seawater, as an external force, plays an important role in shaping coastlines.
The life cycle of vertebrates starts with the production of the reproductive cells of an individual and ends with the production of the reproductive cells...
The bacterial disease known as the bubonic plague is one of the deadliest infectious diseases in the history of mankind.
The building commissioned by Pompey the Great was the first permanent theatre in Ancient Rome.
Majestic even in its ruins, this city was the largest and most populous settlement in the pre-Columbian Americas.