A study reveals that 90% of the population
can be classified in four basic types of personality.
These are: optimistic,pessimistic, trustful and envious.
This last kind, the envious, is the most common
with a 30% against the 20% of each of the others.
Was there any doubt?
This is one of the main conclusions
of a recently published paper
in "Science Advance"
by researchers from Universidad Carlos III of Madrid
and from the universities of Barcelona, Rovira i Virgili and Zaragoza.
The research analyzed the behavior of 541 volunteers
before a hundred of social dilemmas,
with option to collaborate or start a conflict
depending on the individual or collective interests.
The researchers say, these studies are relevant
for improving the existing theories about human behavior,
as they provide an experimental basis.
The results obtained contradict certain theories
like the one that says that humans act in a purely rational way.
As we get older, our brain suffers alterations
that affect our learning and memorizing ability.
Molecular Biology Centre Severo Ochoa's researchers
have shown one of these alterations
is the loss of cholesterol in a brain's part
no matter the rest in the body
closely related to the learning and memorizing processes.
In brain, cholesterol has important functions,
as it is needed to keep
an optimal structure of the cellular membranes.
However, this group, led by Carlos Dotti,
notices that when we grow old,
part of the cholesterol in brain is lost,
altering the function of a specific group of neurons.
The paper published in "Cell Reports"
also shows that when old mice are treated with a drug
that avoids the cholesterol loss in brain
an improvement in their cognitive capacities shows up.
This discovery opens a new door
to the development of treatments that allow memory improvement
in people of an older age.
Contrary to the scientific results,
what common sense says, many developed countries fear vaccines.
Europe seems to question and in many cases,
reject something as vital as vaccination.
In this sense, and while French leadership in distrust
against vaccines includes the 40% of the population,
Spain, with a 9%, is the country
where we most trust our vaccinations programs.
This, however, means four millions of citizens.
This study, a survey of 66,000 people,
and done by the Hygiene and Tropical Medicine School in London,
confirmed the increase in fear to vaccinations
in the countries of the First World.
Meanwhile, some of the poorest countries
like Nigeria, Bangladesh, Indonesia, Ghana, Pakistan or Afghanistan
vehemently defend, sometimes with their own lives,
the power of immunological prevention against pathogens,
that is, vaccination.
Vaccinations save lives, don't hesitate!
For Madri+d and UNED Televisión, José Antonio López Guerrero.