An ant colony consist of a queen, male ants and workers.
Three saturated fatty acid molecules linked to a glycerol molecule.
This animation demonstrates the anatomy of tulips, daffodils and snowdrops.
Many freshwater fishes are also popular as food.
Chlorophyll is a photosensitive green pigment found in plants; it absorbs light energy, thus plays a vital role in photosynthesis.
System that satisfies consumers’ demands of water supply, wastewater disposal, electricity, heat and gas supply and telecommunication.
The withdrawal reflex is a spinal reflex that ensures moving away from potentially damaging stimuli.
This animation demonstrates the main sources of air pollution: agriculture, industry and urban settlements.
Penguins are birds living in the Antarctic and adapted to cold temperature and swimming.
Airports provide infrastructure and services necessary for aviation.
Marine mammals, the largest known animals to have ever existed.
Smoking severely damages the respiratory system, it may cause COPD or lung cancer.
Solomon's temple became one of the most important symbols of Jewish architecture.
Computer hard disk drives are devices of magnetic data storage.
The Emperor of the vast Far-Eastern empire was the lord of life and death.
The anatomy of annelids is demonstrated through the example of the common earthworm.
Moles are small subterranean mammals with modified, spade-like forelegs.
Every era and every culture has specific residential buildings.
The diameter of our galaxy is about 100,000 light years; it contains more than 100 billion stars, one of which is our Sun.
Before the American Civil war the use of slaves on plantations was typical in the Southern states.