Is Mona Lisa smiling? Depends on your mood

Scientists have discovered why the Mona Lisa's expression looks so different to different people and at different times, according to Daily Mail. 

For centuries, art lovers and critics have been perplexed by and debated the Leonardo Da Vinci paintings gaze and slight smile - or is it a grimace? 

But new research, has shed new light on the luminous and seemingly changing face of the Mona Lisa. 

Through experiments on visual perception and neurology, they discovered that our emotions really do alter how we see a neutral face. 

People come from all over the world, to gaze upon Da Vinci's most famous painting. 

Many have remarked on the image's beauty, the late playwright Sir Noel Coward said she looks 'as if she has just been sick, or is about to be,' but for most the fascination in is the uncertainty.

Back in 2005, scientists put the Mona Lisa's face through the paces of its emotion-recognition software.

According to algorithms, her expression is 83 percent happy, nine percent disgusted, six percent fearful and two percent each angry and happy. 

Charles, the creepy mind-reading robot that imitates and understands human expressions

'Emotional' robots have taken a step closer to reality, thanks to a mind-reading machine capable of mimicking human feelings, according to Daily Mail.

The robot, named Charles, is equipped with cameras and software that can record and analyse a person's facial expressions.

This information is then relayed to artificial muscles on the robot, which can replicate facial movements associated with a variety of moods.

Experts hope that the breakthrough will help robots respond to subtle cues revealed by people during a conversation. 

The development could aid the creation of robots that can think and feel like people, which some researchers claim could be a reality within the next decade. 

Are smartphones really making us anti-social?

Researchers say addiction to our devices stems from a desire for MORE personal connection

It seems these days that most people are glued to their devices, often spending more time looking down at a screen than interacting face-to-face, according to Daily Mail.

But, according to new research, smartphone addiction might not be as isolating as it appears.

A team of cognitive anthropologists studying the ‘dysfunctional’ use of smart devices has found that our dependence on the technology likely stems from a desire to connect with other people.

Do YOU Demand Valentine's Gifts?

If your Valentine's Day is all about lavish gifts, your relationship could be on the rocks, new research suggests, according to Daily Mail. 

Researchers analyzed married couples found that higher levels of materialism were linked to a decreased sense of importance of the institution.

The most materialistic were also less happy in their marriage, according to the findings.

Dr Jason Carroll, a professor of marriage and family studies, said couples should avoid focusing on things and instead spend time on their relationships. 

Have you found true love?

A medical test to detect  'true love' will be available in by 2028, according to one of the world's leading neurologists.

The painless test will work by detecting the presence of potent 'love' chemicals in the brain using an MRI-type scanner, according to Daily Mail .

While most people will use the test for 'fun', others will use them to avoid marrying the wrong person or finding out if their relationship is worth the hassle, according to neuroscientist Dr Fred Nour.

The test will detect chemicals, called nonapeptides, that are only produced in significant quantities when a person is truly in love, researchers believe.

Dr Nour spoke about the test launch of his new book, 'True Love: Love Explained by Science'.