Living fossil, important stage in the evolution of tetrapods.
Simple harmonic motion can be considered to be the one-dimensional projection of uniform circular motion.
The Orthodox church, situated on a picturesque cliff, was named after John the Apostle
This animation demonstrates how a washing machine works.
The Tower of Hanoi is a mathematical puzzle.
The animation demonstrates how laser printers work
Woodwind instruments differ from brass instruments mainly in their reed.
By varying the position of the light source, you can examine the shades projected onto the planes of the coordinate system.
Extinct species of fish which had thick ´armour´ protecting the head.
This animation presents animals commonly kept as livestock and the primal cuts of their meat.
This animation demonstrates the use of modern technology in agriculture.
A colourless, odourless, non-reactive gas, it constitutes 78.1% of Earth´s atmosphere.
This animation demonstrates the relative position of lines and planes.
The structure of fortresses developed together with military technology.
This animation demonstrates the angle of inclination of lines and planes in various positions.
Pollen serves to fertilise the egg of plants. Pollen grains come in a variety of shapes and sizes, characteristic of the species.
This animation demonstrates various types of cones and pyramids.
Bài tập về sự hình thành các khối tròn xoay.
The prosperity of the eastern part of the Roman Empire started in the early 4th century, during the reign of Emperor Constantine.
The screw pump commonly attributed to Archimedes made irrigation much more effective