Why do we cry?

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.

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Photo: UNSPLASH

Why do we turn red with embarrassment?

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

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La evolución

The seed of ‘La Evolución’

Human palaeontology in Spain has experienced extraordinary growth in recent decades. In this work we investigate the influence that the book La evolución (1966) and its editors, Miquel Crusafont, Bermudo Meléndez, and Emiliano Aguirre, exerted on this explosion.

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Why can birds without sexual dimorphism distinguish between males and females?

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.

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Flies and carnivorous plants, a new relationship

A team of researchers of the University of Alacant, together with German and Brazilian scientists, have discovered a new interaction between insects and plants. They are fly larvae which can survive in a carnivorous plant and feed from its prey. This is what we know as «cleptoparasitism». According to

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Roger Butlin

Interview with Roger Butlin

Professor of the Department of Animal and Plant Science of the University of Sheffield.

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ancestro universal

The universal ancestor

The cenancestor is defined as the last common ancestor of every currently living being. Its nature has been inferred from the identification of homologous genes between archaea, bacteria, and eukaryotic lineages. These inferences indicate that the cenancestor had a relatively modern protein translation system, similar in complexity to that of a current cell. However, the key enzymes for the replication of genetic material and for cell membrane biosynthesis are not homologous in bacteria, archaea, and eukaryotes. Here, we briefly review the history of the concept of the last universal common ancestor and the different hypotheses proposed for its biology.

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Why do only female mosquitoes bite?

Why do only female mosquitoes bite?

CARLES MARTÍN CANTARINO answers: The answer may be simple, and pretty sure many people already know it: only female mosquitoes bite because they need blood, not for food, but to produce eggs. In fact, a mosquito, male or female, can live quite well without biting, just

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Should I Leave or Should I Stay?

Many factors influence dispersal decisions in animals. However, animals only disperse once they are physically fit enough to reach and settle in the new location successfully.

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14-78

A Living Fossil in Our Wildlife

The curious and primitive aspect of Triops is certainly noteworthy. In fact, it has been under consideration by zoologists for a long time. If we compared fossils with currently living members of the species, we would not be able to tell the difference. These fossils

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