Goats Excel at Learning and Remembering a Complex Tasks
Posted on March 29, 2014 Comments (1)
I like research showing animals using intelligence that seems advanced, for example: Crow Using a Sequence of Three Tools – Insightful Problem Solving in an Asian Elephant – Bird-brains smarter than your average ape – Tropical Lizards Can Solve Novel Problems and Remember the Solutions – Pigeon Solves Box and Banana Problem.
I also like open access science, and this has both: Goats excel at learning and remembering a highly novel cognitive task
The individual learning abilities and long-term memory of goats highlighted in our study suggest that domestication has not affected goat physical cognition. However, these cognitive abilities contrast with the apparent lack of social learning, suggesting that relatively intelligent species do not always preferentially learn socially. We propose that goat cognition, and maybe more generally ungulate cognition, is mainly driven by the need to forage efficiently in harsh environments and feed on plants that are difficult to access and to process, more than by the computational demands of sociality. Our results could also explain why goats are so successful at colonizing new environments.
The experiment was done with domesticated goats. I also learned this from the article, which I didn’t know before:
Refusal to Follow Scientific Guidance Results in Worms Evolving to Eat Corn Designed to Kill The Worms
Posted on March 22, 2014 Comments (0)
An understanding of natural selection and evolution is fundamental to understanding science, biology, human health and life. Scientists create wonderful products to improve our lives: vaccines, antibiotics, etc.; if we don’t use them or misuse them it is a great loss to society.
There is also great value in genetic enhanced seeds and thus plants (through natural human aided processes such as breeding and providing good genetic material over a wide area – distances that would not be covered naturally, at least not in a time that helps us much). Genetic Modified Organisms (GMO) food, in which we tinker with the genes directly also holds great promise but has risks, especially if we forget basic scientific principles such as biodiversity.
By the turn of the millennium, however, scientists who study the evolution of insecticide resistance were warning of imminent problems. Any rootworm that could survive Bt exposures would have a wide-open field in which to reproduce; unless the crop was carefully managed, resistance would quickly emerge.
Key to effective management, said the scientists, were refuges set aside and planted with non-Bt corn. Within these fields, rootworms would remain susceptible to the Bt toxin. By mating with any Bt-resistant worms that chanced to evolve in neighboring fields, they’d prevent resistance from building up in the gene pool.
But the scientists’ own recommendations — an advisory panel convened in 2002 by the EPA suggested that a full 50 percent of each corn farmer’s fields be devoted to these non-Bt refuges — were resisted by seed companies and eventually the EPA itself, which set voluntary refuge guidelines at between 5 and 20 percent. Many farmers didn’t even follow those recommendations.
Using extremely powerful tools like GMO requires society to have much better scientific literacy among those making decisions than any societies have shown thus far. The failure of our governments to enforce sensible scientific constraints on such use of genetic engineering creates huge risks to society. It is due to this consistent failure of our government to act within sensible scientific constraints that causes me to support efforts (along with other reasons – economic understanding – the extremely poor state of patent system, risk reduction…) to resist the widespread adoption of GMO, patenting of life (including seeds and seeds produced by seeds).
Wonderful things are possible. If we grow up and show a long term track record of being guided by scientific principles when the risks of not doing so are huge then I will be more supportive of using tactics such as GMO more easily. But I don’t see us getting their anytime soon. If anything we are much less scietifically minded and guided than we were 50 years ago: even while we bask in the glorious wonders science has brought us on a daily basis.
More Muscle Mass Appears Linked to Longer Life
Posted on March 15, 2014 Comments (0)
New UCLA research suggests that the more muscle mass older Americans have, the less likely they are to die prematurely. The findings add to the growing evidence that overall body composition — and not the widely used body mass index, or BMI — is a better predictor of all-cause mortality. The study was published in the in a closed science journal (it is too bad UCLA promotes such anti-science practices). The research was funded by the NIH (who also shouldn’t allow such anti-science practices).
Dr. Preethi Srikanthan: “many studies on the mortality impact of obesity focus on BMI. Our study indicates that clinicians need to be focusing on ways to improve body composition, rather than on BMI alone, when counseling older adults on preventative health behaviors.”
The researchers analyzed data collected by the National Health and Nutrition Examination Survey (NHANES) III, conducted between 1988 and 1994. They focused on a group of 3,659 individuals that included men who were 55 or older and women who were 65 or older at the time of the survey. The authors then determined how many of those individuals had died from natural causes based on a follow-up survey done in 2004.
The body composition of the study subjects was measured using bioelectrical impedance, which involves running an electrical current through the body. Muscle allows the current to pass more easily than fat does, due to muscle’s water content. In this way, the researchers could determine a muscle mass index — the amount of muscle relative to height — similar to a body mass index. They looked at how this muscle mass index was related to the risk of death.
They found that all-cause mortality was significantly lower in the fourth quartile of muscle mass index compared with the first quartile.
Explaining the Higgs Boson Particle Again
Posted on March 10, 2014 Comments (0)
Excerpt from Piled Higher and Deeper by Jorge Cham – go see the entire illustration.
Related: 5% of the Universe is Normal Matter, What About the Other 95%? – At the Heart of All Matter – The god of small things – CERN Pressure Test Failure – Ninja Professors – Friday Fun, CERN Version
Math Education Results Show China, Singapore, Korea and Japan Leading
Posted on March 4, 2014 Comments (4)
The most comprehensive comparison of student achievement in math and science around the globe undertaken by the Organisation for Economic Co-operation and Development (OECD). The 2012 Program for International Student Assessment (PISA) focuses on math understanding of 15 year olds (the 2014 report will focus on science). The 2009 report focused on the results of science education student achievement around the globe.
2012 results for the math portion (rank – country – mean score)(I am not listing all countries):
- 1 – Singapore – 573
- 2 – Korea – 554
- 3 – Japan – 536
- 5 – Switzerland – 531
- 6 – Netherlands – 523
- 7 – Estonia – 521
- 8 – Finland – 519
- 9 – Canada – 518
- 12 – Germany – 514
- 24 – UK – 494 (this is also the OECD average)
- 34 – USA – 481
- 49 – Malaysia – 421
- 50 – Mexico – 413
All 34 OECD member countries and 31 partner countries and economies participated in PISA 2012, representing more than 80% of the world economy. Portions of China participated and did very well including Shanghai-China (highest mean score of 613 points – if you ranked that as a country, I ignored these “regional results” in the ranks I shown here), Hong Kong-China (561, 3rd if including countries and regions together), Chinese Taipei [Taiwan] (560, 4th), Macao-China (538, 6th).
Boys perform better than girls in mathematics in 38 out of the 65 countries and economies that participated in PISA 2012, and girls outperform boys in 5 countries.
Related: Playing Dice and Children’s Numeracy – Numeracy: The Educational Gift That Keeps on Giving – Mathematicians Top List of Best Occupations – The Economic Consequences of Investing in Science Education – Country H-index Ranking for Science Publications – Economic Strength Through Technology Leadership