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Extinction Risks and Particle Physics: When Are They Worth it?

The Large Hadron Collider, LHC, is the worlds biggest particle accelerator and due to start investigating the structure of matter later this year. Now a lawsuit has been filed in the US calling on the U.S. Department of Energy, Fermilab, the National Science Foundation and CERN to stop preparations for starting the LHC for a reassessment of the safety of the collider. The reason is fears that the high energy collisions could cause some form of devastating effect threatening the Earth: either the formation of miniature black holes, strangelets that absorb matter to make more strangelets or even a decay of the vacuum state of the universe. Needless to say, physicists are very certain there are no risks. But how certain should we be about safety when there could be a risk to the survival of the human species?

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Are artists, writers, sportsmen, academics, scientists, politicians, and businessmen addicts?

Various news sources
this week, including Fox News and The Guardian, are reporting on an editorial published in this month’s American Journal of Psychiatry. In it, the author, Jerald J. Block, argues
that internet addiction is a real psychological disorder, and that it ought to
be recognised as such in DSM-V, the fifth edition of the Diagnostic and Statistical Manual of Mental Disorders, which is
currently being compiled by the American Psychiatric
Association.

Read More »Are artists, writers, sportsmen, academics, scientists, politicians, and businessmen addicts?

Remembering what happened vs. remembering what it meant

An upcoming issue of the Psychological Bulletin will
include a review suggesting that the memories of children may be more reliable
– at least for evidential legal purposes – than the memories of adults.

The review conducted by Valerie Reyna and Chuck
Brainerd assesses over thirty studies sparked by their own earlier research on what they call the Fuzzy Trace Theory. According to that theory, people store
two different kinds of memory of experiences: memory of what happened (verbatim memory), and
memory of the meaning of what happened (gist memory). Reyna and Brainerd hypothesised that
children rely more on the former, and adults rely more on the later, and they presented results indicating that this makes adults more prone to certain sorts of ‘false
memory’, since what an event meant to someone may be inconsistent with what
actually happened. In the upcoming review, Reyna and Brainerd will claim that the slough of publications triggered
by their initial research backs up these hypotheses.

Suppose that Reyna and Brainerd are right. What
would follow?

Read More »Remembering what happened vs. remembering what it meant

Changing the Building Blocks of Life: Playing God and Being gods

All life on earth has the same simple basic structure. It is based on the genetic code contained in DNA. The differences in DNA between a toad and Albert Einstein are what determines their different properties.

The active ingredients in DNA are also simple. They are 4 bases: cytosine, guanine, adenine and thymine, or A, T, C and G. The order of these 4 bases is what determines the characteristics of life, the differences between Einstein and a toad.

Scientists in California have created two new bases in addition to A, T, C and G: dSICS and DMMO2. These new bases function like natural ones, they pair appropriately with their partner and are faithfully copied by the natural enzyme, DNA polymerase, responsible for making the billions of copies of DNA necessary to programme each cell in the body of a living organism.

At present, these new bases or building blocks do not do anything. But scientists hope they could be used

"for hundreds of purposes: for example, to build complex shapes, to build complex nanostructures, silence disease genes or even perform calculations… [and even]expand the genetic code and ‘evolvability’ of an organism."

Read More »Changing the Building Blocks of Life: Playing God and Being gods

Stairlifts, wheelchairs, and radium-powered toasters

The BBC has
reported plans by the government to
ensure that all new homes are built to accommodate the needs of an ageing
population. Under these plans, new homes
would need to include features such as stairs wide enough to fit a stairlift,
downstairs bathrooms, and room for wheelchairs to turn. The plans are, reportedly, part of a wider
initiative to make entire neighbourhoods more old-people-friendly, through—for
example—building better pavements and kerbs, improving street lighting,
thoughtfully positioning bus stops, and ensuring access to amenities such as
toilets.

The plans
have been welcomed by organisations such as Help the Aged and Age Concern, who
believe that such measures will enable old people to live independently for as
long as possible. A spokesman for Help
the Aged is quoted as saying, ‘We live in an ageing population and our housing
must meet the needs of older people, both now and in the future’.

Read More »Stairlifts, wheelchairs, and radium-powered toasters

Earache for teenagers

The BBC today
reported calls to scrap an acoustic device designed to disperse crowds of
troublesome teenagers. There are 3,500
such ‘Mosquito’ devices in use in England, which work by emitting a
sound normally audible only to those under the age of 25. The sound is turned on for 20 seconds at a
time, and becomes irritating after around 15 seconds, causing those who can
hear it to move away. Typically, the
devices are installed in areas where groups of teenagers gather, such as
shopping precincts.

Read More »Earache for teenagers

A child of many parents: a new way to have two mothers

The Guardian and Telegraph, are today reporting that British scientists have created ten human embryos which each include DNA from one man and two women. This was done by taking a one day old IVF embryo and removing its pronuclei (the parts containing the chromosomes from the parents). These were then inserted into an egg cell from the second woman, which has had its nucleus removed. The result is a new embryo with its primary DNA coming from a man and a woman, and the body of its cell coming from the second woman. This is an amazing experiment, and comes hot on the heels of other multi-parent experiments, but why has it been performed and what are the ethical implications?

Read More »A child of many parents: a new way to have two mothers

I won’t be coming to work today – I’d rather go back to sleep

The BBC
reported yesterday that the inability of
some people to get out of bed in the morning is genetically determined. A study at the University of Zurich
found that individual cells have ‘clocks’, which regulate body processes. The schedule of these clocks determines whether one is better suited to early mornings or late nights.

When a pattern of behaviour is found to be
biologically based, those who exhibit it often find themselves excused from
responsibility for it, particularly if it is correctable. It is not the fault of dyslexics that they
make mistakes reading and spelling, and it is not the fault of Tourette
syndrome sufferers that they make offensive remarks. As a result, medical help is provided for
sufferers of these conditions. Sometimes, however, the view that those who exhibit undesirable,
biologically-determined behaviour should be excused from responsibility for it,
and their behaviour medically corrected, is controversial. For example, many view the widespread
prescription of Ritalin to treat attention-deficit hyperactivity disorder
(ADHD) in children as suspect, in part because it encourages the view that
unruly but normal children are diseased, and therefore excuses those children
and their parents from applying discipline to reign in the offending behaviour.

Read More »I won’t be coming to work today – I’d rather go back to sleep

Restoring Sensation to Amputees’ Lost Limbs

Scientists at the Rehabilitation Institute of Chicago and Northwestern University made two amputees ‘feel’ their lost arms by rerouting to their chest the key nerves that transfer sensations from hand to brain. After several months, stimulation to the area of the nerves would produce rich sensations experienced as if occurring in the missing limbs. Interestingly, the patients could still distinguish between sensory stimulation of chest nerves and that of the rerouted arm nerves.

For a summary, see Yahoo News

For the original paper, see PNAS paper

Read More »Restoring Sensation to Amputees’ Lost Limbs