Scientists have genetically modified a cat as part of an experiement that could lead to treatments for conditions like cystic fibrosis.
Named Mr Green Genes, he look likes a six-month-old cat but, under ultraviolet light, his eyes, gums and tongue glow a vivid lime green, the result of a genetic experiment at the Audubon Centre for Research of Endangered Species in New Orleans.
New research shows that people with blue eyes have a single, common
ancestor. A team at the University of Copenhagen have tracked down a
genetic mutation which took place 6-10,000 years ago and is the cause
of the eye colour of all blue-eyed humans alive on the planet today.
“Originally, we all had brown eyes”, said Professor Eiberg from the
Department of Cellular and Molecular Biology. “But a genetic mutation
affecting the OCA2 gene in our chromosomes resulted in the creation of
a “switch”, which literally “turned off” the ability to produce brown
Humans have basically three forms of memory: Sensory, long-term and short-term. Long-term memory is just like hard-drive space. Similarly, short-term memory functions like a very small RAM. This short-term
memory is capable to hold only about five to nine (seven is an average)
items at a time.
Retrieving information longer than this will need you to either pack
it together into seven units or store it in long-term memory.-- Mind Cafe
In the 1980s . . .Benjamin Libet performed an experiment that
seemed to show that areas of the brain responsible for certain body
movements activate before we are conscious of our decision to move.
Researchers in Europe recently decided to test Libet's conclusion
again. A group of 14 volunteers was asked to press either of two
buttons, one with the left hand and one with the right, whenever they
wanted, so long as they noted the time when they made their decision.
Watching the patterns of activity in the volunteers' brains,
researchers could predict which button the individuals would pick up to
10 seconds before they had consciously made their choice.
Eight-year-old children have a radically different learning strategy
from twelve-year-olds and adults. Eight-year-olds learn primarily from
positive feedback ('Well done!'), whereas negative feedback ('Got it
wrong this time') scarcely causes any alarm bells to ring.
Twelve-year-olds are better able to process negative feedback, and use
it to learn from their mistakes. Adults do the same, but more
According to researcher Eveline Crone,
'The information that you have not done something well is more
complicated than the information that you have done something well.
Learning from mistakes is more complex than carrying on in the same way
as before. You have to ask yourself what precisely went wrong and how
it was possible.'