12 NOV 2015 by ideonexus
Attributes of Domesticated Animals
The study of domesticated animals since Darwin’s influential
work (1868) has culminated in the formation
of a set of changes that are claimed to distinguish domestic
populations from wild species (for recent outlines
of these see Price 1984, 1999; Hemmer 1990; Tchernov
and Horwitz 1991; Hall 1993; Teichert 1993; Smith 1995;
Zohary, Tchernov, and Horwitz 1998; Clutton-Brock
1999; Trut 1999). Although not uniformly present in all
domesticated species, those affecting the skeleton may
include ...Folksonomies: evolution domestication
Folksonomies: evolution domestication
1 
notes
notes09 NOV 2015 by ideonexus
Physiological Decline in the Body When You Stop Exercising
...regular endurance exercise leads to four major consequences:
Increased ability of the heart to eject blood
increased ability of the blood vessels to send blood to where blood is needed
Increased number of capillaries (the vessels that deliver oxygen and ‘food’ to the muscles)
increased size and the number of mitochondria (the “power plants” of the cells).
All these changes lead to the more efficient use of oxygen, as well as nutrients.
[...]
Pino considers a person who can run... 1 notes
notes27 APR 2015 by ideonexus
Exercise "Sweet Spot" for Extending Lifespan
They found that, unsurprisingly, the people who did not exercise at all were at the highest risk of early death.
But those who exercised a little, not meeting the recommendations but doing something, lowered their risk of premature death by 20 percent.
Those who met the guidelines precisely, completing 150 minutes per week of moderate exercise, enjoyed greater longevity benefits and 31 percent less risk of dying during the 14-year period compared with those who never exercised.
The sweet s...
1 06 APR 2015 by ideonexus
Ideal Amount of Exercise for Longevity
People who got some exercise, but not enough to meet the physical activity recommendations were still 20 percent less likely to die over a 14-year period than those who did not do any physical activity. (The recommendations say to do 150 minutes of moderate activity per week or 75 minutes of vigorous activity per week.)
People who engaged in the recommended level of physical activity saw even more benefit: They were 31 percent less likely to die during the study period, compared with those w...
1 Who recommendation is 150 minutes moderate or 75 minutes vigorous a week. Three to five times this amount was linked with a 39% reduction in mortality; therefore, 7.5 hours moderate exercise or 3.75 hours vigorous for best results.
18 FEB 2015 by ideonexus
Human Self-Domestication
...the hypothesis of human self-domestication has recently been revived as a possible explanation of changes of human physical traits since the late Pleistocene. These changes include the reduction of body size and decrease in skeletal robusticity, modifications in cranial and dental features including reduction in cranial capacity, shortening of the facial region of the skull and maleruption of teeth, and reduction in sexual dimorphism. In contrast to earlier biological writings, other domes...24 DEC 2013 by ideonexus
The Cost of Irrational Fears
Imagine the typical emotional reaction to seeing a spider: fear, ranging from minor trepidation to terror. But what is the likelihood of dying from a spider bite? Fewer than four people a year (on average) die from spider bites, establishing the expected risk of death by spider at lower than 1 in 100 million. This risk is so minuscule that it is actually counterproductive to worry about it: Millions of people die each year from stress-related illnesses. The startling implication is that the r...Garrett Lisi explains how the stress caused by many of our fears of statistically-unlikely events is more likely to kill us.
05 JUN 2012 by ideonexus
Science as Art of Symbols
Science is the reduction of the bewildering diversity of unique events to manageable uniformity within one of a number of symbol systems, and technology is the art of using these symbol systems so as to control and organize unique events. Scientific observation is always a viewing of things through the refracting medium of a symbol system, and technological praxis is always handling of things in ways that some symbol system has dictated. Education in science and technology is essentially educ... 1 notes
notesUsed to control the bewildering diversity of events in nature.
14 JAN 2012 by ideonexus
A Early Definition of Human Social Progress
Disease is largely a removable evil. It continues to afflict humanity, not only because of incomplete knowledge of its causes and lack of individual and public hygiene, but also because it is extensively fostered by harsh economic and industrial conditions and by wretched housing in congested communities. ... The reduction of the death rate is the principal statistical expression and index of human social progress. It means the saving and lengthening of lives of thousands of citizens, the ext...That emphasizes a reduction in the death rate and argues that this is something we can do through education and improving the quality of life.
