Most people are trichromats, possessing three types of cone cells to see color with. A woman in northern England has four types of working cone cells, which means she has the ability to see far more colors than most of us can.
After more than 25 years of searching, neuroscientists in the UK recently announced that they’ve discovered a woman who has an extra type of cone cell — the receptor cells that detect color — in her eyes.
As we age the brain loses its flexibility, this in turn affects our ability to learn, to remember things and adapt to new situations. The classic theme is of an older person who is stuck in a rut and unable to change how they think.
This is also a common concern people raise when any discussion of healthy longer lives are mentioned. The concern is that we would have a world of people living more decades and becoming so set in their ways that society would stagnate.
However, many proponents of rejuvenation biotechnology refute this and suggest that mental plasticity could be rejuvenated just the same as cells and tissues could be. The new study we will discuss today offers us a hint of what might be possible, although the focus here is specifically on the visual cortex[1].
Gold climbed to the highest since mid-June, pushing up mining-company shares amid military tensions between the U.S. and North Korea.
Equities slid and the Swiss franc and some developed-market government bonds advanced as President Donald Trump threatened North Korea with “fire and fury” following a series of missile tests by the communist regime, boosting demand for haven assets. Gold also climbed after Indian imports of the metal were said to have doubled.
The U.S. North-Korea tensions add to investor angst that has helped push up gold more than 10 percent this year, even with equities hitting records and the Federal Reserve keen to shrink its balance sheet. Should geopolitical tensions intensify, gold is likely to be in demand as a safe-haven, according to analysts at Commerzbank AG.
