The study of waves and their behavior may be more intuitive if we think of large mechanical models and very simple non-periodic waves, such as pulses. Consider, for example, a freight train with many wagons

A coil spring very popular as a toy (a Slinky) is an easy resource to visualize the three different types of movement in the medium through which a wave passes [1]. First move the end of the spring from

Image: Andrei Shpatak. There are large variations in the concentration of respiratory pigment from one species to another. Therefore, there are also important differences between species regarding the

An interdisciplinary group of physicists and biologists working in the research of brain cells has conceived a new and revolutionary technique of microscopy that, for the first time, allows to obtain images

Sometimes it is possible to achieve fame, but rarely comes thanks to what one expects. History is full of artists whose best known works are not, however, their most objectively relevant works. Marian

Source Cell therapy is increasingly being used to address different diseases. Unlike classic medicines such as tablets or capsules, the new drugs combine biomaterials and cells to create systems for the

Hackmenite (Afghan variety) presents photochromism when irradiated with ultraviolet light (orange tones); the blue tones are, mostly, wunchite. Source: Wikimedia Commons We know positively that the excess

Neutrons, those neutral particles found in the nucleus of atoms, are not elementary particles, since they have structure. While they are stable when they are in the atomic nucleus, they disintegrate when

The large collision, which occurred shortly after the Big Bang, will result in one of the largest objects in the universe. Artist’s impression of SPT2349-56 shows a group of interacting and merging galaxies