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346. Exhibition: The Secret World Inside You (14 December 2015)
It is well known that yoga affects our physical and mental health. What it is less known is that it has an important influence on our internal ecosystem. The human body harbours trillions of microorganisms that have profound effects on our health and even on our mood. On 7 November, the American Museum of Natural History (AMNH) opened an eye-catching exhibition called The Secret World Inside You, which is devoted to present in a very attractive and didactic way the ecosystem that we have inside our bodies; it can be visited until 14 August 2016. 1
Over the past ten years, researchers were able to discover that in addition to the 30 trillion human cells, the human body has around 100 trillion microbial cells (bacteria) living inside us … and “on us,” forming a vast ecosystem that has received the colourful name, the microbiome. This ecosystem plays an important role in many conditions that genes and environmental factors alone cannot explain. Some of the conditions that are deeply affected by the microbiome include obesity, autism, depression, asthma, allergies, and even cancer. Researchers have also found, as the exhibition illustrates, that the microbiome has a strong influence on our immune system and the way our vagus nerve functions. In 2008, the National Institute of Health (NIH) launched a fund called the Human Microbiome Project (HMP) to generate resources to finance research that would have an important application in human health and disease (http://hmpdacc.org/overview/ about.php).
The exhibition, which can be visited in about one hour, is composed of seven major sections. It begins by examining the human skin, and asks the visitor: “Where are the microbes most diverse?” Then, it shows how the skin is affected by our environment, and discusses how a baby’s microbiome develops as it is born and explains why births by Caesarean section can adversely affect a baby’s immune system as a factor in developing allergies and asthma. There is also important information about the benefits of breastfeeding.
One of the most fascinating sections is the one devoted to the microbiome in the gut. For quite some time physicians have given particular attention to the gut; it is even known as “the second brain.” Research has found that many diseases are associated with “indigestion” and that stress affects the gut (“having butterflies” is a common complaint). There is also increasing evidence that stress can stop the functioning of the immune system and the exhibition explores how this happen.
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