>Sugar causes depression
If you've been feeling especially blue, a new study suggests getting those visions of sugar plums out of your head.
Researchers at the University of Kansas say that the added sugars found in virtually all holiday sweets can induce inflammatory and neurobiological processes that are connected to depression and negative feelings.
Seasonal-depression and winter-depression symptoms will push individuals to eat more sweets.
This will, in turn, only create a vicious cycle of feeling down and eating sweets to feel better, only to end up feeling even worse.
Researchers said the inflammation caused by excess sugar is the number one contributor to depressive thoughts.
They recommend non-processed foods, particularly those rich in plant-based and Omega-3 fatty acids, in order to combat depression on a dietary level.
>Smith most common last name
"Smith" is still the most commonly used surname in every English-speaking country around the globe, a study has found.
Lending firm NetCredit has researched the world's most common family names by country by charting its usage in a series of maps.
The maps show that Smith is still the most frequently used surname in the US, the UK, Canada, Australia and New Zealand.
The name "Smith" originates as an Anglo-Saxon term for a metal worker or blacksmith.
Some reports put the very first use of surnames as early as 2852 BC in China.
In China, one in every 13 people have "Wang" as their second name.
In South Korea, one in five are named "Kim", and in Vietnam, 25% of people are named "Nguyen".
The most prevalent surname in South America is "Gonzalez" which derives itself from a Spanish name, originating in the German word for "battle".
>First 3D-printed neighborhood
A giant 3D printer built two houses in an impoverished, rural part of Mexico last week, breaking ground on what will be the first 3D-printed neighborhood in the world.
The poor families live in a seismic zone that's prone to flooding in the state of Tabasco, Mexico.
Building something that will withstand an earthquake and keep them dry during heavy rains was a key consideration when it came to the design.
A nonprofit called New Story paired up with a construction technology company that developed Vulcan II, the 3D-printing robotics being used on the project.
The 33-foot printer pipes out a concrete mix that hardens when it dries, building the walls one layer at a time.
It takes several days to build two houses at the same time.
The concrete mix is sturdier than traditional concrete. The foundation is reinforced to withstand seismic activity.
Developers hope to build 50 new houses by the end of 2020, replacing structures residents built themselves out of wood, metal and whatever materials they could afford.
>Air quality worst on cruise
The level of pollution on some cruise ship is worse than in the world's most polluted cities like Delhi, an investigation on Britain's biggest crew operator P&O Cruises has found.
The investigation found one cruise ship can emit as much particulate matter as 1m cars in a day.
The air on the deck downwind of the ship's funnels had 84,000 particulates per cu cm, according to data from particle counter.
Directly next to the funnels on the deck, the numbers rocketed to 144,000 with a peak at 226,000.
Passengers are likely to be breathing some of these particulates, which are harmful for health and the environment.
"Short term exposure can cause increasing respiratory symptoms. People who are asthmatic for example, that might give them a wheeze. Similarly for people with cardiovascular disease," an expert said.
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