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Research published in Science assesses for the first time quantitatively the climate projections made by scientists at oil company Exxon and ExxonMobil Corp between 1977 and 2003. According to the study, most of their projections accurately predicted warming consistent with subsequent observations. However, the authors point out that the company's public statements contradicted its own scientific data.
A study published by the company Rejuvenate Bio claims to have prolonged the life expectancy of healthy older mice, while improving other health parameters. The study used a gene therapy—introducing three genes, known as Yamanaka factors, that are particularly active in embryonic cells. According to the authors, the remaining life expectancy of the mice (whose age was equivalent to about 77 years in humans) was doubled, with a 7% increase in absolute terms. The results have been shared in a pre-print publication and have not yet been peer-reviewed.
According to estimates by the United Nations Inter-Agency Group for Child Mortality Estimation (UN-IGME) published by UNICEF, in 2021 some 5 million children died before their fifth birthday, and another 2.1 million children and young people did it between the ages of 5 and 24. Additionally, 1.9 million babies were stillborn during the same period.
Studies on risks, especially those related to health, generate headlines because they are of concern to the public. A good understanding of risk is crucial for making decisions such as getting vaccinated, taking care of one's diet, choosing a contraceptive method or changing consumer habits. However, it is difficult: it is a statistical concept that is often identified with danger and provokes feelings, so its perception is subjective. This guide, accompanied by an infographic, brings together seven recommendations for risk information from the expert María del Carmen Climént.
New estimates published in Science claim that under the most optimistic scenarios, glaciers will globally lose much more mass and contribute more to sea level rise than current estimates, including those published in the latest IPCC report.
Procrastination in a sample of more than 3,500 students was associated with the development of both mental and physical health problems nine months later, according to a study conducted at several universities in Sweden. The results are published in the journal JAMA Network Open.
A study has analysed the citation patterns of 45 million scientific articles and nearly 4 million patents over the last 60 years. Its conclusion is that scientific and technological innovation is proportionally less and less disruptive, although this characteristic remains constant in absolute terms. The results are published in the journal Nature.
Constant checking of social media activity in early adolescence is associated with changes in the brain's sensitivity to rewards and punishments. This is the conclusion of a study involving 169 12- and 13-year-old students in the United States with Facebook, Instagram and Snapchat profiles, according to JAMA Pediatrics.
Physical activity is associated with significant reductions in depressive symptoms in children and adolescents, according to a systematic review and meta-analysis published in JAMA Pediatrics that included 21 studies with 2,400 participants. The largest decreases in these symptoms were found in those aged 13 years and older.
An international study led by Spanish researchers has succeeded in reconstructing the ancestors of the CRISPR-Cas system present in extinct bacteria from up to 2.6 billion years ago. The reconstructed systems work and are more flexible than the current ones. According to the authors, this could open up new avenues for gene editing. The results are published in the journal Nature Microbiology.