It’s official. We Canadians rock. If William Shatner and Bryan Adams aren’t enough for you, there’s Chris Hadfield. He’s an astronaut with the Canadian Space Agency and has become hugely popular with his videos about life aboard the International Space Station, answering such profound questions as how to cut your nails in space.
Now Hadfield is coming home. He’s turned over command of the ISS to Russian cosmonaut Pavel Vinogradov and will be departing on a Soyuz module, which will land in Kazakhstan today at 10:31 p.m. EDT. As a final sendoff, he’s made the first music video in space, a cover of David Bowie’s “Space Oddity.” Hadfield isn’t a bad musician, and the video has beautiful visuals of him on the ISS.
Put it on full screen, sit back and enjoy. It’s a great day to be Canadian.
A new study has found a possible way to stop at least one species of mosquito from giving you malaria – by infecting them with a special strain of bacteria.
Researchers have found that infecting mosquitoes with the Wolbachia bacterium makes it nearly impossible for malaria to survive in the insects, thus keeping them from spreading it to humans, the BBC reports. The technique was tested on Anopheles stephensi, a species that ranges from the Middle East to Asia. An example is shown here in this Wikimedia Commons image. This remarkable photograph shows the insect sucking blood from a human. It’s become so engorged it’s actually ejecting extra blood from its rear end. Sorry if you were eating when you saw this but hey, it’s in the name of science.
The bacteria passed from female mosquitoes to their offspring, opening up the possibility of infecting the entire species. Researchers followed 34 generations of infected mosquitoes and found the bacteria passed on through all of them. The results have been published in the journal Science. A study last year showed the same bacteria can be used to stop dengue fever.
The technique has not yet been tried on Anopheles gambiae, the main source of malaria in Africa.
Not feeling healthy? Go hiking. Two new studies from the UK show that a hike, or even a good walk around the city streets, boosts mental and physical health.
A new survey by Ramblers, the British walking charity, found that a quarter of adults in Britain walk for an hour or less a week. And when they’re talking about walking, they don’t mean hitting the trails in the local nature reserve, they mean all types of walking, including walking to the shops, work or school. Presumably walking to the fridge to get another lager isn’t included. Of the more than 2,000 people surveyed, a staggering 43 percent said they walked for only two hours or less a week.
The Ramblers cites government health advisers who recommend that you get 150 minutes of moderate physical activity a week. Walking counts in this, and is one of the easiest ways to get fit. Not only does it reduce the risk of several physical ailments like heart disease, it reduces weight and improves mental activity and emotional well being. It also saves money on gas and public transport.
The British Heart Foundation has more details on their webpage.
Another new study shows that being outside more is more beneficial than we generally think. While many people worry about the harmful effects of the sun, a new study by Edinburgh University has found that UV rays cause the body to produce nitric oxide, a compound that reduces blood pressure. Researchers suspect that the benefits of exposure to the sun may outweigh the risks.
Archaeologists working near Stonehenge have found that habitation in the area started at least 3,000 years before the famous monument was built.
The BBC reports that a team of archaeologists working at Amesbury next to a stream a mile from Stonehenge have found evidence that hunter-gatherers were frequenting the site well before Stonehenge was started around 3000 B.C.
The site is the closest source of water to Stonehenge and therefore would have been of prime importance for the local hunter-gatherers during the Mesolithic, the period before the Neolithic farming era when Stonehenge was started. Not only would it have been important as a water source and for the plants that grew along its banks, but hunters could have bagged the animals that came to drink there. Carbon dates from butchered animal bones at the site give ages of 6250 B.C., 5400 B.C. and 4700 B.C.
The excavation is run by David Jacques, a tutor at Open Univeristy. A hundred Open University students and other members of the public volunteered for the dig, which is running on a shoestring budget. The excavation has also uncovered material from later periods, including a pair of duck figurines dating from 700 B.C. Open University has an interesting video about the dig dating from 2011, before the important radiocarbon dates came in.
The team was excavating ahead of construction of Bloomberg Place, in the heart of what used to be Londinium, the capital of the Roman province of Britannia. Over the course of six months, archaeologists picked their way through seven meters of soil to find some 10,000 artifacts dating from the very start of Roman occupation in the 40s A.D. to the end in the early fifth century. This painstaking work revealed whole streets of the ancient city with wooden buildings preserved up to shoulder height, prompting archaeologists to dub it the “Pompeii of the North.” The damp soil not only preserved the buildings, but also perishable artifacts such as the leather shoe and the basket shown here. The team also found a previously unexcavated section of the Temple of Mithras.
Other finds include phallic good luck pendants; a hundred writing tablets, some containing affectionate personal letters; and the bed of Walbrook, one of the “lost” rivers of London. There’s also this amber amulet in the shape of a gladiator’s helmet shown here.
Bloomberg Place will be Bloomberg’s European headquarters once it’s completed in 2016. A museum on site will exhibit the finds to the public.
Mayor Michael Bloomberg of New York City has deep connections with London that were the subject of a recent feature in the New York Times.