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...
Several ingenious instruments have been invented over the centuries to help in navigating the seas.
This animation demonstrates how a turbojet engine works.
The building commissioned by Pompey the Great was the first permanent theatre in Ancient Rome.
Massive accelerating or orbiting bodies cause ripples in spacetime. These are called gravitational waves.
This animation explains active and passive transport processes occurring through cell membranes
This physicist-inventor and electrical engineer who mainly dealt with electrotechnics was undoubtedly one of the most brilliant figures of the second...
Standing bodies of water can form in depressions on the surface by both endogenic and exogenic forces, as well as by human activity.
Carrier of genetic information in cells.
This animation explains the most important characteristics of waves through sound waves.
Carved into a granite cliff, the sculptures of the Mount Rushmore National Memorial depict four great United States presidents.
Deforestation has a negative impact on the environment.
Amino acids are the monomers of proteins.
The 'wise man' originated in Africa and dispersed throughout most of the continents.
Chameleons are reptiles with an ability to change their colours.
The fortress-like palace was built by Roman Emperor Diocletian on the coast near his home town.
The layers of different types of forests may vary.
Majestic even in its ruins, this city was the largest and most populous settlement in the pre-Columbian Americas.
As a result of the revolutionary advances in the Neolithic, settling human communities established the first lasting settlements.
What happens in a liquid during evaporation and boiling? What does its boiling point depend on?