Posts tagged genetics
In the “War of the Worlds” by Herbert Wells Martian invaders were defeated by the common cold, which none of the sides took into account. Could something similar happen to the astronauts who will land on Mars? What if the first extraterrestrial life form humans will come into contact with will be viruses? These issues are posed in the journal Astrobiology by Dale Griffin.
Biologists do not consider viruses living beings. They are smaller than bacteria and cannot reproduce themselves: that is why to survive they need to invade a cell and use its genetic tools. Nevertheless, it is viruses that (more…)
One of the main dogmas of modern biology is that all somatic (asexual) cells of the body have exactly the same gene. In different cells, it only manifests itself in different way to provide their individuality and functionality. But it turns out that it is not exactly so.
Recent in-depth studies of genomes of nerve cells have shown that they can be both larger and smaller than the (more…)
Scientists discovered the “allergy gene” and are convinced that eventually allergies are a genetic anomaly that can mutate. Under this logic, scientific studies went on to conclude that human genes are not static.
In fact, genes can and do change during the life of a person. Lifestyle and diverse environmental factors can transform and destroy the DNA. This process goes on from generation to generation, changing the data that we currently know.
The truth is that a number of everyday things have already affected the human DNA. Here are some of them:
Cell phone radiation
For years, scientists have insisted that the radiation from mobile phones affects the human DNA. Several studies have confirmed that, but most of us still insist on holding the headset at the ear, despite the fact that technology offers us handsfree.
However, many wireless headsets even increase the radiation to the brain, thus being just a bad choice. One solution is using… (more…)
Gray hair and wrinkles are only the external signs of aging, which are often not sufficient to determine the exact age of the person. A scientist from the University of California found that the “biological clock” embedded in our genes can define much more precise age of human cells and tissues. Perhaps it would help understand why some tissues age faster than the rest, and which ones are more prone to cancer.
“In order to fight aging, we have to find an objective way to measure this process. My mission is to help scientists understand what exactly (more…)
In science fiction (such as “Star Trek”), teleportation is a usual thing. But how much time and effort is necessary to submit the data required for human teleportation? Students at the Physics Department of the University of Leicester Declan Roberts, James Nelms, Suzanne Thomas and David Starkey decided to answer this difficult question.
The students found that the energy required for teleportation of one individual depends on the bandwidth, which automatically means less time, but the increase in power consumption.
In their work, the students explored the possibility of teleportation of one person on the Earth’s surface into space orbit. (more…)