Why you can't listen to two people speak at once: Our brains have a 'bottleneck' for speech perception

If you struggle to keep track of more than one conversation at a dinner party, you're not alone.

Scientists now suspect it is physically impossible to pay attention to more than one person speaking at once, according to Daily Mail.

Researchers from the University of Maryland came to this conclusion after scanning 28 people's brains in a 'cocktail party' scenario as they listened to two speakers. Their brains kicked in as normal to listen to the first speaker, but appeared not even to recognise the second person's speech as words.

The findings provide an explanation for why it may be so hard to concentrate on a family member's conversation when the television is on, or to follow what someone is saying in a crowded room.

Why screen time can disrupt sleep

For most, the time spent staring at screens -- on computers, phones, iPads -- constitutes many hours and can often disrupt sleep. Now, Salk Institute researchers have pinpointed how certain cells in the eye process ambient light and reset our internal clocks, the daily cycles of physiological processes known as the circadian rhythm. When these cells are exposed to artificial light late into the night, our internal clocks can get confused, resulting in a host of health issues, according to Science Daily.

Drinking tea or coffee during pregnancy REDUCES baby size even if you consume less than the 'safe' amount

Women who drink tea or coffee during pregnancy are more likely to have small babies, research suggests.

Even women who drink less than the 'safe' cutoff of 200mg caffeine - about two mugs of instant coffee or three cups of tea - are more at risk of having low-birth weight or premature newborns , according to Daily Mail.

The researchers, from University College Dublin, believe caffeine restricts blood flow to the placenta, affecting babies' growth.

Results further found the women who consumed the most caffeine had babies weighing around 0.37lbs (170g) less than those who had the least.

Soda is worse for you than sugary food: Sweet drinks put people at GREATER risk of developing type 2 diabetes

Artificially sweetened drinks put people at a greater risk of developing type 2 diabetes than other sugary foods, a new study warns.

Products with added fructose introduce excess 'nutrient poor' energy into our diet, researchers found - inflicting a harmful effect on blood sugar levels, according to Daily Mail.

The Canadian research team found no risk associated with food and drinks that have naturally-occurring fructose - such as whole fruits, vegetables, natural fruit juices and honey.

Watching more than 2hours and 12minutes of daytime TV can lead to an early death, major study warns

Watching television for hours on end each day is bad for your health and can even lead to an early death, warned a large-scale study last night.

It linked long spells in front of the TV to habits like smoking, drinking and bad diet as well a higher threat of heart disease, according to Daily Mail .

Those at the greatest risk live in poorer areas, according to data from nearly 329,000 people.

The research by the University of Glasgow examined the health of people aged 40 to 69, checking how many watched television for four hours or more a day.