Newton’s theory of gravity explains the effect of this force on matter but doesn’t explain its cause. It was the genius of Einstein who solved this mystery when he presented his theories of special and general relativity. Theory that is reaching its 100 years of being proven.

## The Recaman sequence

Mathematics has different areas, one of them is the number theory, which includes the mathematical sequences and series, which have peculiar characteristics and a unique aesthetic. An particularly interesting case is the Recamán sequence.

## Misconceptions

Most of the concepts in science are clear and easy to associate with our daily life, but there are concepts and theories that are often misinterpreted.

## Twinkle little star!

The song “twinkle, twinkle little star”, is a children’s classic; which describes how a star changes its brightness. This description of a star has a connotation that, from the point of view of astrophysics and astronomy, is a big problem.

## Time

The year’s start is a special moment, the beginning of a new cycle, and although this period is somewhat subjective, it allows us to estimate and appreciate time as a continuous, constant and permanent flow. Yet time has profound implications if we associate it with aspects of physics.