Both the sense of balance and that of hearing depend on the action of mechanoreceptors, hair cells that detect the movement of solid or liquid particles. Most animals maintain a definite orientation to Earth's gravity; when taken from their typical position, they try to return to it.

Fungi are popularly known for molds, molds, yeasts, yeasts, wooden ears, truffles and champignon mushrooms. It is a very large group, made up of about 200,000 species spread in virtually any type of environment. Fungi and their Ecological Importance Fungi have a wide variety of ways of life.

A dwarf planet is a celestial body very similar to a planet in that it orbits around the Sun and has sufficient gravity to assume a hydrostatic (approximately spherical) equilibrium shape but does not have an unobstructed orbit. An example is Ceres which, located on the asteroid belt, has the path of its orbit full of those little stars.

Word that originates from the Latin term nebula, meaning "cloud". Nebulae are clouds of dust, hydrogen, helium and plasma. Most nebulae are vast in size, spanning sizes up to hundreds of light years in diameter.

Planets do not produce light, they only reflect sunlight, which is the star of the Solar System. Theories claim that the planets were also formed from very hot portions of mass and that they are all cooling down. Some, including the Earth, have cooled enough to present a solid surface.

The clarification of the mechanism of action of biological evolution was only concretely obtained from the works of two scientists, the French Jean Baptiste Lamarck (1744 - 1829) and the English Charles Darwin (1809 - 1882). The evolutionary discussion, however, raises great controversy. For this reason it is necessary to describe initially the main evidence of evolution used by evolutionists in defense of their thesis.