cygnus x 1 forat negre

The Nobel Prize in Physics, orbiting black holes

The Swedish Academy has awarded Roger Penrose, Reinhard Genzel, and Andrea Ghez the Nobel Prize in Physics. What is behind this shared award? When did the debate on black holes start? An analysis by Manel Perucho.

illustr palletes estiu

Straws are for the summer

Using simple materials like plastic bottles, straws, modelling clay, and syringes you can witness many interesting phenomena relating to air and water pressure.

illustration large hugo salais sling

Not just the Moon and a sling

Probably of Paleolithic origin and present since the first civilisations, the sling is ancient and ubiquitous not only as a weapon, but also as the paradigm of circular movement.


Why do wet materials become darker?

When a material gets wet, we see it with a darker colour. Professor Inmaculada Pascual Villalobos explains why.

Richard Feynman

The physicist who did not follow the beaten path

Richard Phillips Feynman (1918–1988) was certainly a curious character, as he himself remarked in the subtitle of his anecdotal books (Feynman, 1985; Feynman, 1988). Not only was he one of the most brilliant and original physicists of the twentieth century, one of the few scientists who opened up new and broad avenues in his discipline.

mar blava

Why is the sea blue?

When a large quantity of water is observed, as happens in the sea, we notice a blue color that can vary depending on the mass of water we are observing. Professor Inmaculada Pascual Villalobos explains why.


Violent universe

We see the sky and admire its regularity and stability, its apparent immutability. We have always done so; it does not come as a surprise, since humans have always been startled by any change in the sky, associating it with omens or the mood swings of gods. At that time, they might call these changes «new stars», even if they were, for example, a supernova explosion, as in the case of Tycho’s supernova in the sixteenth century.


And they were detected a hundred years later

En el marc de la teoria general de la relativitat, Einstein va postular l’existència de les ones gravitacionals, encara que pensava que mai es podrien detectar.


Mario Bunge

Interview with Mario Bunge, philosopher and physicist.

James Clerk Maxwell

Electromagnetic Unification

James Clerk Maxwell proved that electricity and magnetism are only different manifestations of the same physical substrate, electromagnetism.