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Your pupil dilation holds telling indications of your sexual orientation, a new study has claimed.

Researchers from Cornell University used a specialised infrared lens to measure pupillary changes to participants watching erotic videos.

Pupils were highly telling: they widened most to videos of people who participants found attractive, thereby revealing where they were on the sexual spectrum from heterosexual to homosexual.

Brains of people who suffer from schizophrenia may attempt to repair damage caused by the disease, suggesting an adult brain`s capacity to change and grow.

Professor Cyndi Shannon Weickert, Dipesh Joshi and their colleagues from Neuroscience Research Australia studied the brains of 38 schizophrenic people and 38 normal people, focussing on one of the hardest-hit regions — the orbitofrontal cortex, the part of the brain involved in regulating emotional and social behaviour.

Moderate exercise can ease depression in patients with chronic heart failure, a new study has claimed.

Researchers from Duke University Medical Center found that exercise for chronic heart failure patients improved mental and cardio-vascular health.

“Exercise has been shown to be safe for people with heart disease, and it also improves depression. These data show the combined benefits of exercise for this population include improved mental health and improved cardio-vascular health,” James A Blumenthal, lead author of the study said in a statement.

A non-invasive treatment with a soft infra-red light can protect and heal the damage to the human retina in Parkinson`s disease, says a study.

“Near infra-red light (NIR) treatment has long been known to promote the healing of wounds in soft tissues such as skin. Our recent studies are showing that it can also protect the retina of the eye from toxins which attack its nerve cells,” said Jonathan Stone, professor at the Vision Centre and the University of Sydney, who led the study.

Cow`s milk is unsuitable for babies as it is nutritionally inadequate, a study has claimed.

“Cow`s milk deprives babies of proper nutrition as it contains high levels of protein unsuitable for immature kidneys of infants,” Head of Biochemistry and Nutrition, All-India Institute of Hygiene and Public Health, Debnath Chaudhuri, said.

Scientists have cracked the mystery of why women outlive men, its all in the genes!

Researchers from Monash University found that mutations to the DNA or deoxyribonucleic acid of the mitochondria can account for differences in the life expectancy of males and females.

Mitochondria, which exist in almost all animal cells, are vital for life because they convert our food into the energy that powers the body.

The research uncovered differences in longevity and biological ageing across male and female fruit flies that carried mitochondria of different origins.

In some good news for burn victims and sufferers of other skin-related conditions, replacement skin may soon be easily available as scientists have engineered artificial skin by mixing biomaterials.

Researchers from the University of Toronto are growing centimetres of artificial skin at a time, a huge step-up from previous techniques which could grow just microns at a time, the Daily Mail reported.

The researchers are able to grow sheets of skin by placing individual cells into a gel-like sheet, and they can even be grown into specific shapes – such as letters.

People with poor mental health may have a shorter lifespan, according to a large-scale population based study.

Researchers from University College London (UCL) and University of Edinburgh analysed data from over 68,000 adults aged 35 years and over who took part in the Health Survey for England from 1994 to 2004.

Participants in the study had been evaluated for mental health problems using a recognised scale ranging from no symptoms to severe symptoms of depression and anxiety, reported the British Medical Journal.

Concussions and even lesser head impacts may accelerate the brain`s natural ageing process, a new study has claimed.

Researchers from the University of Michigan found that brain injuries can cause signalling pathways in the brain to break down more quickly than they would in someone who has never suffered a concussion.

The study looked at college students with and without a history of concussion and found changes in gait, balance and in the brain`s electrical activity, specifically attention and impulse control.

Here is Olympics for the rest of us! According to a new research any exercise that gets the heart pumping may reduce the risk of dementia and mild cognitive impairment.

Researchers from Mayo Clinic found that aerobic exercise can sharpen the brain and also boost the mood.

“We know that 30 minutes of aerobic activity of any kind five times per week is associated with a reduced risk of cognitive decline. So it is important to stay active often and as early as you can,” Rodolfo Savica, a Mayo Clinic neurologist said in a statement.

Toxic car exhaust fumes in small amounts could cure heart disease, scientists experimenting on pig hearts have claimed.

British scientists are monitoring the impact of tiny quantities of toxic chemicals found in car exhaust fumes to cure heart disease in pig hearts, the `Daily Mail` reported.

Chemists at University of Highlands and Islands (UHI) are using toxic chemicals carbon monoxide and nitric oxide to widen blood vessels and prevent blood clots.