Galileo Galilei's scientific achievements contributed greatly to the advancement of physics and astronomy.
The heart is the central pump of the cardiovascular system beating several billion times over our lifetime.
Ancient Egyptians worshipped a large number of gods and goddesses.
Eukaryotic cells with nuclei measuring only a few micrometres may contain nearly 2 metres of DNA, coiled multiple times.
A selection of legendary buildings from the history of civilisation.
In benzene there are sigma bonds and delocalised pi bonds between carbon atoms.
Bacteria are unicellular organisms that have no nuclei and are a few micrometres in length.
The Cassini spacecraft was exploring Saturn and its moons for nearly 20 years.
What happens in a liquid during evaporation and boiling? What does its boiling point depend on?
The English engineer George Stephenson’s locomotive was built for a competition of locomotives in 1829.
Rivers play an important role in shaping the Earth's surface: they cause erosion as well as carrying and depositing sediment.
A widespread snail species, also popular as food.
Systemic circulation carries oxygenated blood from the heart to the body, while pulmonary circulation carries oxygenated blood from the lungs to the heart.
Carved into a granite cliff, the sculptures of the Mount Rushmore National Memorial depict four great United States presidents.
The 'wise man' originated in Africa and dispersed throughout most of the continents.
Humans have 4 types of teeth: incisors, canines, premolars and molars.
Bones of the upper limbs form the pectoral girdle and the arms.
Olfactory receptors produce electric signals when stimulated by odours.
This animation demonstrates the anatomy of spiders through the example of a common European species.
The skin is the soft outer covering of our body, its three layers are the epidermis, the dermis and the hypodermis.