L’al·lèrgia és una patologia clínica que pateixen alguns individus i que es desenvolupen front a molècules inofensives (és a dir, que no són tòxiques ni infeccioses) anomenades al·lèrgens. L’al·lergen provoca una resposta immunitària de l’organisme, que és l’autèntica causant dels danys i la simptomatologia de l’al·lèrgia.

In the early hours of 26 April 1986, the operators of the Chernobyl nuclear power plant were preparing to check the safety systems of the plant.

Coding DNA is that which contains the genes that produce protein within the genome, while non-coding DNA can be formed by genes that produce different types of RNA, but they do not translate into proteins.

El que observem des de la Terra és la llum ens arriba de punts de l’Univers tan distants a nosaltres que han necessitat tot aquest temps per arribar.

In human beings, it is very difficult to discern what is learned and what is innate in our behaviour. Despite this, the rejection most human adults feel from snakes might be an instinct inherited from our ancestors.

In Mediterranean ecosystems, fires are quite frequent naturally and generate large open spaces ideal for the germination and growth of many Mediterranean plants

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

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.

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.

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.

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 shapes as suspended bodies in the

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

We call a mirage seeing objects where they are not. It is an optical illusion that can be seen on very hot days and in places like deserts. Inmaculada Pascual Villalobos explains this and tells us about the «Fata Morgana» effect.

Blushing is a specifically human characteristic, since our closest relatives, such as the chimpanzee, gorilla, or orangutan, do not blush.

It is important not to overeat food items such as legumes and vegetables, fruits such as pears or plums, dairy products such as milk or cheese, and also products like bread or cereals, with whole grains such as wheat or rye.

María Soledad Prats Moya, from the Departament de Química Analítica, Nutrició i Bromatologia of the Universitat d’Alacant, explains.

When we talk about species without sexual dimorphism, we should complete the sentence with a small note: species without a sort of sexual dimorphism that we can detect.

Palm oil is a plant oil consisting on saturated fats, which increase cholesterol and cardiovascular risks.

The answer to this is yes. Plants can reproduce errors in the growth of some cells, which would cause the formation of cell masses or tumours that could be considered cancers.

Question asked by MARÍA JOSÉ ESTAY OSSES. We speak with JESÚS RIERA: The answer is yes. The air carnation belongs to the genus Tillandsia. Most plants from this genus can live