How Airplanes Fly
Please let me remind all of you--this material is copyrighted. Though partially funded by NASA, it is still a private site. Therefore, before using our materials in any form, electronic or otherwise, you need to ask permission. There are two ways to browse the site: (1) use the search button above to find specific materials using keywords; or, (2) go to specific headings like history, principles or careers at specific levels above and click on the button. Teachers may go directly to the Teachers' Guide from the For Teachers button above or site browse as in (1) and (2). Almost everyone today has flown in an airplane. Let us start by defining three descriptions of lift commonly used in textbooks and training manuals. The second description we will call the Popular Explanation which is based on the Bernoulli principle. The third description, which we are advocating here, we will call the Physical Description of lift. The popular explanation of lift Newton’s laws and lift Air has viscosity
Animal Pharm: What Can We Learn From Nature’s Self-Medicators?
Birds do it. Bees do it. Butterflies and chimpanzees do it. These animals and many others self-medicate, using plants and other surprising materials to improve not only their own health but also the health of their offspring. Monarch butterflies swarm a tree in Sierra Chincua, Mexico. A video of capuchin monkeys at the Edinburgh Zoo shows them rubbing onions and limes on their skin and into their fur as an antiseptic and insect repellent. While cigarette-butt wallpaper may not appeal to most of us, other ways that animals self-medicate might be worth watching. “It’s not the only way, but it seems to me that a sensible way [to aid in human drug development] would be to watch what animals do in nature to see how they exploit the natural products, the pharmaceuticals that are available to them in the environment, and try to learn from them,” he says. Earlier this year, Hunter spent time with people of the Shangaan tribe in South Africa. Diverse “Doctors” Bee Benefits
Khan Academy
Biophotons: The Human Body Emits, Communicates with, and is Made from Light
Increasingly science agrees with the poetry of direct human experience: we are more than the atoms and molecules that make up our bodies, but beings of light as well. Biophotons are emitted by the human body, can be released through mental intention, and may modulate fundamental processes within cell-to-cell communication and DNA. Nothing is more amazing than the highly improbable fact that we exist. We often ignore this fact, oblivious to the reality that instead of something there could be nothing at all, i.e. why is there a universe (poignantly aware of itself through us) and not some void completely unconscious of itself? Consider that from light, air, water, basic minerals within the crust of the earth, and the at least 3 billion year old information contained within the nucleus of one diploid zygote cell, the human body is formed, and within that body a soul capable of at least trying to comprehend its bodily and spiritual origins. The Body's Circadian Biophoton Output
Earth, Atmospheric, and Planetary Sciences | 12.409 Hands-On Astronomy: Observing Stars and Planets, Spring 2002
Rhodiola for What Ails You? - Ask Dr. Weil
Originally published, May 2008. Updated, October, 2012. Rhodiola (Rhodiola rosea), sometimes called Arctic root or golden root, is considered an adaptogenic herb, meaning that it acts in non-specific ways to increase resistance to stress, without disturbing normal biological functions. The herb grows at high altitudes in the arctic areas of Europe and Asia, and its root has been used in traditional medicine in Russia and the Scandinavian countries for centuries. Studies of its medicinal applications have appeared in the scientific literature of Sweden, Norway, France, Germany, the Soviet Union and Iceland. Rhodiola is still widely used in Russia as a tonic and remedy for fatigue, poor attention span, and decreased memory; it is also believed to make workers more productive. I asked my friend and colleague, Tieraona Low Dog, M.D., an expert on botanical medicine, for her view of this remedy. Andrew Weil, M.D.
Anthropology | 21A.219 Law and Society, Spring 2003
blog In the News: Four in five children are not ‘connected to nature’ -
Large numbers of British children are missing out on engaging with nature, according to a new study. Red squirrel First of its kind The ground-breaking study, led by the RSPB, marks the first time that connectivity between children and nature has been studied in the UK. Following 3 years of research, the project concluded that only 21% of children between the ages of 8 and 12 were ‘connected to nature’ at a level which is considered to be both realistic and achievable for all young people. The report stems from growing concerns over the distinct lack of contact with and experience of nature among modern children, which some have argued is having a negative impact on their education, health and behaviour. Horse chestnuts in autumn Connecting to nature Around 1,200 children from across the UK took part in the study, which was based on a specially developed questionnaire. “This report is ground-breaking,” said Rebekah Stackhouse, Education and Youth Programmes Manager for RSPB Scotland.
Hacker Typer
Shinrin-yoku: The Japanese Art of Forest Bathing
A walk in the woods can be a fun way to spend a weekend or holiday, but as it turns out, it may have health benefits that surpass what you expect. In Japan, the practice of shinrin-yoku, or forest bathing, is a practice observed by about a quarter of the country. Dr. Qing Li is considered to be one of the world's foremost experts on shinrin-yoku. He is associate professor in the Department of Hygiene and Public Health at Nippon Medical School in Tokyo and serves as president of the Japanese Society of Forest Medicine and Vice-President and Secretary General of International Society of Nature and Forest Medicine (INFOM). Photography by Dr. Dr. “In 1982, the Forest Agency of Japan first proposed a new movement called 'forest bathing trip' (shinrin-yoku) to promote a healthy lifestyle," Li explained. The Power of Forests Can Japanese Practices Work Abroad? This begs the question, can the health benefits of forest bathing be translated to other nations? Children and Nature Dr.
