2 . Due to climate changes, Arctic ice is breaking up earlier in the spring, and its area is decreasing. This is creating problems for polar bears that make their homes off northern Alaska and in Hudson Bay.

Polar bears off Alaska normally hunt and raise their young on ice sheets that float on the ocean. But as the ice has melted, the polar bears have been forced to spend more time on land. There, they have begun to frequent beaches, feeding on the remains of whales caught by native hunters. For polar bears, this food is less nutritious than seals that they normally catch on ice sheets. The shrinking (减少) ice has also forced more polar bears into the ocean. In the past, they only had to swim short distances between ice sheets. But as the ice has shrunk, polar bears have been forced to swim longer and longer distances in the open ocean. This poses a severe danger during rough weather, and an increasing number of drowned polar bears have been observed.

In Hudson Bay, the ice breaks up three weeks earlier in the spring now than it did 20 years ago. Polar bears on Hudson Bay fast (绝食) during the summer, waiting for ice to form in the fall to hunt. Every year, the summer gets longer, and the bears get skinnier. Over the past 25 years, the average weight of the female bears has dropped 68 kg. This loss affects their ability to reproduce, and already the number of births has dropped by 15 percent. Unless the bears can learn to survive these climate changes, these giants of the ice may one day disappear.

3 . Researchers studied data from the National Health and Nutrition Examination Survey, organised by the Center for Disease Control (CDC) in the United States and looked at the relationship between coupe of coffee drunk per day, and both total body fat percentage and abdominal or ‘trunk’ fat.

They found that women aged 20- 44 who drank two or three cups of coffee per day had the lowest levels of obesity, 3.4% lower than people who did not consume coffee. Among women aged between 45-69. those who drank four a more cups had an obesity percentage 4.1% lover.

Overall, the average total body fat percentage was 2.8% lower among women of all ages who drank two or three cups of coffee per day.

The findings were consistent whether the coffee consumed was caffeinated or decaffeinated and among smoker/non-smokers and those suffering from chronic diseases when compared to those in good health.

In men, the relationship was less significant although men aged 20-44 who drank two or three cups per day had 1.39% less total fat and 1.8% less trunk fat than those who did not consume coffee.

Around 7 million tons of coffee is consumed globally every year. Dr Lee Smith, Reader in Public Heath at Anglia Ruskin University and senior author of the study, said: “Our research suggests that there may be active compounds in coffee other than caffeine that manage weigh and which could potentially be used as anti-obesity compounds.”

“It could Le possible that coffee, or its effective ingredients could be integrated into a healthy diet strategy to reduce the burden of chronic conditions related to the obesity,” Dr Lee Smith added, “I is important o interpret the finding of this study in light of its limitations-the study was at a specific point in time so trends cannot be established. However, we don't believe that someone’s weight is likely to influence their coffee consumption.”

4 . Whether you're looking for antiques, food, collectors' items or just random junk, our rich heritage has produced some of the finest markets in the world. Here are 3 of them.

Traders have long sold their goods in the shadow of the city’s spectacular castle, which dates back to 1130—－and it’s a tradition that shows no sign of abating. Edinburgh Farmers’ Market takes place on Castle Terrace every Saturday and attracts a huge crowd with its locally sourced goods. The market is now in its 15th year and champions the very best in Scottish produce, from knitwear to organic water buffalo and lobster.

Looking for an old-style prosthetic leg, a ventriloquist’s dummy, or even a suit of armour? The chances are you will find what you are after—and plenty of other random stuff—at one of the hundreds of stalls here. A market and two huge car-boot sales are held throughout the week all year round, come rain or shine.The market has been running for 25 years and is a well-known treasure trove for antiques experts looking for a bargain.

Follow your nose along May Street in Belfast and the smells of delicious home-made food from across the globe will land you in St George’s Market. With three different weekly markets accompanied by fresh food and live music, St George’s was once voted the best in the UK. When Belfast became an important port in the 17th century, the range of goods grew and trading thrived.