People who are diagnosed with dementia may initially report problems on memory and/or language that affect their activities of daily living. Once factors such as depression, delirium, or mild cognitive impairment, are disregarded, these people are typically referred to a neurologist, radiologist, and neuropsychologist or speech therapist who will help them to understand the reason […]
Chemistry • Condensed matter • Energy • Materials • Physics
The German mineralogist Gustav Rose (1798 – 1873) made important contributions in the fields of petrology and crystallography. He was the first to use a reflective goniometer in Germany and developed a particular interest in the relationship between the crystalline form and the physical properties of minerals. As a consequence, he contributed significantly to the […]
Since the cells were discovered with the advent of the microscope in the late seventeenth century, scientists have tried hard to find out what is going on into them. An avalanche of techniques and technologies emerged over the course of decades slowly discovering important molecular features of the cellular world to our knowledge and our […]
Tracking back human civilization there are evidences of dog domestication as far as 10,000 years ago. During this time, the ancient wolves’ genome evolved to give rise to the domestic dog that gradually adapted to human habitat as many organic functions were selected in detriment of others. Dogs have similar circadian rhythms, have adapted to […]
Boron, in the periodical table situated in the 13 group (group III according to the former nomenclature), is a semiconductive element with properties between that of a metal and a nonmetal. Boron compounds are widely used materials in various branches of industry. Recent studies show its importance in biology as for example to various metabolic […]
Under the threat of those annoying genetic parasites called viruses, eukaryotic cells developed, on the top of a wide innate defence, a curious and efficient RNA-based adaptive immune system referred as RNA interference or iRNA. You will find more info about this surveillance system, which detects and destroys foreign RNA molecules entering the cell with […]
Of all the seven wonders of ancient times, only the pyramids of Egypt remain on their feet. The technical means Egyptians had that many years ago for building these huge structures were extremely limited, and that is the main reason for them being so fascinating: they could build them despite the huge technical difficulties they […]
Recently, a very interesting article has appeared in Nature . It is mainly directed to non-specialists, in order to help to interpret the scientific results with care, making the appropriate conclusions and, sometimes even more important, avoiding the wrong ones. The twenty tips can be directly applied when the results coming from statistical analysis are […]
Humanities & Social Sciences • Science • Technology • Weekly Selection
Ancient strips of bamboo hold multiplication table A multiplication table in base 10 has been revealed in ancient strips of bamboo found in China that date back to around 305 B.C. About 2,500 bamboo strips were donated to Tsinghua University in Beijing five years ago, and researchers discovered ancient Chinese calligraphy written on the strips […]
The functioning of the human brain goes far beyond a bunch of cells packed together; each of them is able to produce, receive, and transform electrical signals into a concrete response that affects the neighboring cells, counted by hundreds. This image is already complex, but if we say that the electric signals are constituted by […]