Homosexual behaviour has always been considered a paradox from an evolutionary point of view because it does not produce offspring, but there are nuances to this.

The mechanism that produces white hair is not well known. It is very likely, although not definitely proven, due to the oxidation of melanin caused by the aging of the hair follicle cells.

The new Mètode monograph, Narrating health, shows the different ways in which the literature connects medicine and health.

There are numerous causes for eye redness, and many of them are not serious. Begoña Domenech Amigot, professor of the Department of Optics, Pharmacology, and Anatomy of the University of Alacant, explains.

Violence resulting from armed and political conflicts has led many societies to carry with them the suffering of those who have disappeared. This issue is dedicated to the role played by social and forensic sciences in the service of shed light on memory. Deadline for submission: 1 December 2018.

JORGE OLCINA answers: Clouds are formed by condensation of air vapour in the atmosphere. Despite their simple, smooth and generally graceful appearance and their varied

Darwin is credited with the opinion that crying only lubricates the eye, but today it is accepted that it has an intrapersonal and an interpersonal function.

The sclera, known for its color as «the white part of the eye», is an opaque, resistant, and fibrous membrane that covers part of the eyeball, giving it shape and protecting its interior.

According to the astrophysicist and communicator Javier Armentia, supermoons do not really exist. As he explains, the term is not astronomical, but vulgar astrology.

Vicent J. Martínez, Full Professor of Astronomy and Astrophysics of the University of Valencia, answers this question about the two sides of the Moon