The Learning Network Blog: Should Scientists Try to Help People Beat Old Age So We Can Live Longer Lives?

Queries about concerns in the news for students 13 and older.

What would occur if anti-aging analysis actually succeeded — if our regular daily life expectancy shot up from practically 80 to 100, 120 or even longer? Would that breakthrough be a excellent thing?

Need to scientists consider to aid individuals beat outdated age so we can reside radically longer lives?

In the Opinion piece “On Dying Soon after Your Time,” Daniel Callahan argues that extending human life would truly diminish our lives.

…Of program, the dream of beating back time is an old 1. Shakespeare had King Lear lament the tortures of aging, although the myth of Ponce de Leon’s Fountain of Youth in Florida and the eternal daily life of the Struldbrugs in “Gulliver’s Travels” each fed the notion of overcoming aging.

For some scientists, recent anti-aging study — on gene treatment, body-component substitute by regeneration and nanotechnology for repairing aging cells — has breathed new lifestyle into this dream. Optimists about regular existence expectancy’s surpassing a hundred years in the coming century, like James W. Vaupel, the founder and director of the Max Planck Institute for Demographic Research in Germany, cite promising animal scientific studies in which the lives of mice have been extended through genetic manipulation and low-calorie diet plans. They also point to the a lot of daily life-extending health-related advances of the previous century as precedents, with no finish in sight, and note that average daily life expectancy in the United States has prolonged been growing, from 47.three in 1900 to 78.seven in 2010. Other folks are much less sanguine. S. Jay Olshansky, a research associate at the Center on Aging at the University of Chicago, has pointed out that sharp reductions in infant mortality make clear most of that rise. Even if some folks lived effectively into outdated age, the death of 50 percent or more of infants and youngsters for most of history stored the common life expectancy down. As these deaths fell dramatically above the previous century, existence expectancy elevated, assisted by improvements in nutrition, a decline in infectious condition and advances in medicine. But there is no cause to believe one more sharp drop of that kind is in the cards.

Even if anti-aging study could give us radically longer lives someday, even though, need to we even be seeking them? Irrespective of what science makes possible, or what personal individuals want, aging is a public problem with social consequences, and these should be thought through.

Students: Read the complete article, then tell us …

• Must scientists attempt to aid men and women beat old age so we can dwell radically longer lives? Why?


• How lengthy would you want to reside, if you could pick your lifestyle span?


• Do you agree with the writer that “adding many years to a lifestyle does not necessarily make it any fuller?”


• What would be the rewards of a scientific breakthrough that permitted individuals to live radically longer lives?


• Do you think the benefits outweigh the prospective adverse consequences, this kind of as higher well being care expenses for society and fewer jobs for young individuals? Explain.

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Students 13 and older are invited to comment beneath. Please use only your first title. For privacy policy reasons, we will not publish student feedback that incorporate a final name.

The Learning Network Blog: Should Scientists Try to Help People Beat Old Age So We Can Live Longer Lives?

Bill Gates charity challenges scientists to make better condoms

Graphene could be mixed with the latex used in standard condoms to make a stronger and far more pleasurable model, scientists believe. Photograph: Getty Photos

The “wonder material” graphene faces its stiffest challenge nevertheless in delivering thinner, more powerful, safer and far more desirable condoms.

A research group from the University of Manchester has received a Grand Difficulties Explorations grant of $ one hundred,000 (£62,123) from the Bill and Melinda Gates Foundation to develop new composite nano-components for next-generation condoms.

The challenge is to create new technology that can make the condom much more desirable to use, which could lead to far more folks utilizing them.

Composite resources are composed of a mixture of two materials, in this case graphene and an elastic polymer such as the latex employed in classic condoms.

Graphene is the world’s thinnest, strongest and most conductive material, and promises a huge variety of varied applications from smartphones and ultrafast broadband to laptop chips.

It was 1st isolated by Sir Andre Geim and Sir Kostya Novoselov at the University of Manchester in 2004 and earned them the Nobel prize for physics in 2010.

The study will be carried out beneath the leadership of Dr Aravind Vijayaraghavan at the newly established Nationwide Graphene Institute at Manchester.

Vijayaraghavan explained: “This composite material will be tailored to increase the normal sensation throughout intercourse even though employing a condom, which should encourage and market condom use.

“This will be achieved by combining the power of graphene with the elasticity of latex to produce a new material which can be thinner, more powerful, far more stretchy, safer and, maybe most importantly, more pleasurable.”

He continued: “Because its isolation in 2004, men and women have wondered when graphene will be used in our everyday lifestyle. Presently, individuals picture employing graphene in mobile-telephone screens, meals packaging and chemical sensors.

“If this venture is effective, we might have a use for graphene which will practically touch our every day lifestyle in the most intimate way.”

Dr Helen Meese, head of resources at the Institution of Mechanical Engineers, stated: “The prospective of graphene is limitless, and the grant to the University of Manchester to seem at worldwide wellness troubles underlines just how ground-breaking this wonder material could be.

“As properly as condoms, graphene could possibly be used in every little thing from batteries which charge in seconds to photovoltaic windows which make electricity.

“However, despite the United kingdom getting at the very forefront of graphene research, the country’s commercialisation of the materials has been woeful.

“Of the 7,500 graphene-based mostly patents filed throughout the world by 2013, only 54 are from the United kingdom, or significantly less than one%. In comparison, over two,200 are held by China and one,754 by South Korea.

“As it stands, the Uk is failing to harness the amazing potential of the material it has led the globe in creating.”

Bill Gates charity challenges scientists to make better condoms

Notre Dame geologists’ discovery should cause earth scientists to rethink chemical makeup of Earth’s mantle

Ol Doinyo Lengai, Tanzania

A new discovery by researchers from the University of Notre Dame’s Department of Civil and Environmental Engineering and Earth Sciences could modify prevailing assumptions about the chemical makeup of the Earth’s mantle.

Antonio Simonetti, an associate professor in the department, and his doctoral student Wei Chen worked in cooperation with Vadim Kamenetsky of the University of Tasmania, Hobart (Australia) to learn the art of conducting chemical and mineralogical analyses of melt inclusions within crystals of the mineral magnetite (Fe3O4).

Simonetti factors out that the magnetite crystals are hosted within igneous rocks (rocks resulting from the melting of the Earth’s mantle) referred to as carbonatites.

Antonio Simonetti

“The latter are an exceptional and intriguing sort of igneous rock since they are composed primarily of calcium carbonate, or Calcite-CaCO3, rather than silicate minerals, which are the predominant minerals in the Earth’s crust and oceanic rocks,” Simonetti mentioned. “Despite the modest quantity of carbonatite occurrences globally compared to their volcanic counterparts in the previous and existing day, carbonatites carry on to receive considerable deserved interest since of their unique enrichment, relative to crustal abundances in incompatible trace aspects, this kind of as niobium and the rare Earth components.”

To date, most of the geological community believed that the sodium- and potassium-wealthy magmas being erupted at the Earth’s sole lively carbonatite volcano at Ol Doinyo Lengai in Tanzania were distinctive, given that all other carbonatite occurrences globally are dominated by calcium-wealthy carbonate or calcite.

In an attempt to resolve this question, Wei sought to figure out the initial melt composition that gave rise to the Oka carbonatite complex, which is positioned in southeastern Quebec.

“We approached this concern by examining the nature and chemical composition of melt inclusions within person magnetite crystals present in carbonatites,” Simonetti said. “Melt inclusions are micron-sized ‘pockets’ present within minerals that represent a blend or mechanical mixture of co-trapped crystals and melt engulfed and isolated early in the crystallization historical past of the magma whilst the magnetite crystals had been forming. Consequently, investigating melt inclusions represents a strong tool for determining the chemical composition of the first carbonatite magma at the Oka complex.”

Wei and Simonetti’s analysis uncovered that the chemical composition of minerals trapped inside the melt inclusions at the Oka complicated are alkaline in nature and similar in composition to the minerals present at Ol Doinyo Lengai volcano. The finding will have a significant impact in relation to deciphering and modeling chemical processes taking area in the Earth’s mantle during geologic time.

“This has some significant consequences as to how earth scientists must view the total chemical budget of the Earth’s mantle considering that this is in which carbonatite magmas are developed,” Simonetti mentioned. “We are not attributing enough alkalies in the area of the mantle where carbonitite melts kind.”

In addition to its significance for the area of earth science, the finding also has essential practical and strategic relevance. Carbonatites are of essential relevance in the continually evolving fields of superconductors, electronics and computing. Numerous nations this kind of as the USA, China, Brazil and Canada are host to carbonatite occurrences, and there is active exploration in numerous of these nations to locate new deposits offered the ever-escalating demand for the manufacturing of sophisticated electronic parts.

The paper describing Wei and Simonetti’s investigation seems in the journal Nature Communications.

Make contact with: Antonio Simonetti, simonetti.3@nd.edu

Notre Dame geologists’ discovery should cause earth scientists to rethink chemical makeup of Earth’s mantle