By Laura Husband

Four of the 10 worst countries for environmental impact are from the American continent, a new study has found.

The study, carried out at the University of Adelaide, in Australia awarded Brazil and the US first and second place for being the least environmentally friendly.

Ecology expert Corey Bradshaw from Adelaide’s Environment Institute gave countries environmental rankings based on how much they had damaged the environment.

Fisheries were one of seven factors measured that made Brazil the least environmentally friendly country.

The countries were rated using seven factors: Natural forest loss, habitat conversion, fisheries, fertiliser use, water pollution, carbon emissions from land use and threat to species.

These indicators were chosen because there is a lot of evidence to support that they affect ecosystems and quality of life, explained Bradshaw.

From the American continent, Brazil, the US, Mexico and Peru were all listed in the 10 worst countries category along with China, Indonesia, Japan, India, Russia and Australia.

The total wealth of each country was found to be the most important driver of environmental impact.

The top 10 for being most environmentally friendly were, surprisingly, some of the least wealthy countries, mainly from the Caribbean and Africa: Antigua and Barbuda, St Lucia, Grenada, Djibouti, Barbados, Swaziland, St Vincent and the Grenadines, Gambia, St Kitts and Nevis and Tonga.

“There is a theory that as wealth increases, nations have more access to clean technology and become more environmentally aware so that the environmental impact starts to decline. This theory was not supported by our study,” explained Bradshaw.

By Paul Rodgers

Most creatures that use sound do so for communication, to find a mate, warn off rivals or warn of predators. Bats, and a few other creatures, such as cetaceans, use it differently. Their calls are designed to locate obstacles, prey and each other in space. Or so scientists thought.

Bats can, it turns out, distinguish between calls made by members of their own species and others, even those that are closely related and inhabit similar ecological niches, according to research by scientists at the Max Planck Institute for Ornithology (previously part of the Kaiser Wilhelm Society, which was renamed in honour of the quantum physicist after the Second World War).

Horseshoe bats can hear foreign accents.

Bats living in similar environments tend to use similar echolocation calls to orient themselves and search for food. But in a paper in this month’s American Naturalist, Maike Schuchmann and Bjorn Siemers at the institute’s facility in Seewiesen, Austria, were able to prove that echolocation calls carry more information than assumed.

Horseshoe bat species in Bulgaria were used for the behavioural experiments, in which scientists played the calls of three different species through ultrasonic speakers and analysed the animal’s responses. Both the Bulgarian bat species showed signs of being able to distinguish the calls, although the effect was clearer with calls that were in a clearly separate frequency band from their own.

Siemers reasoned that it would be advantageous for bats to get out of the way of competitively superior species in hunting grounds. And if the other species roosted in similar roosting requirements, identifying them could help the bats find new shelters. The institute’s scientists hope to do follow-up experiments to see whether either of these hypotheses explains the new-found ability.

By Grace Howe

Natural historian and filmmaker Keith Scholey is producing three full length wildlife documentaries that will examine the behaviour of cheetahs, tigers, and lions in their natural habitat.

The first film, due for release in America this autumn, is entitled ‘Big Cats’. Five years in the making, it was made primarily using the new Sony F23 camera, which is discreet and advanced enough to cause minimal interference in any animal’s environment. The camera can be left for days in the wild without needing attendance or interruption from human hands.

This technology provided a unique opportunity for capturing animals in a gathered community. The film is an attempt to view these creatures in an entirely new way, by allowing their natural behaviour and interaction with each other to create a storyline and give phrasing and drama to the piece, with little influence or explanatory commentary from the BBC editing team.

Cheetah with impala kill

I spoke to Keith, co-producer of the Blue Planet and Planet Earth series, about the idea behind this new film and how the production has developed since the final rushes were gathered.

“Keith, What inspired you to become a filmmaker instead of sticking to science on paper? You began this journey with a biology degree!”

“In a rather geek-ish way, the subject just obsessed me, I wanted everyone to be interested in what I was interested in, and excited by the same sights. During travelling and in my first jobs in wildlife documentary, I felt enormously privileged to view what I had done and intrigued by the possibilities of sharing it.”

“In this film, you have attempted to capture the essence of how the Masai-Mara lions and cheetahs interact with each other. It is based in Kenya, and offers a view a to how these big cats live and function in their own life journey, and to create a feature film instead of an ‘informative documentary’ Why did you decide to film with this new objective?”

“We wanted to show these beautiful animals in an entirely new way. It is an attempt to explore how they live and communicate. That animals are aware of their life and their own life span is left to the side of most documentary explanation. This film is shot over two generations of each species, so there is the family line to follow.

I wanted to show that cats are aware, as we are, of preference, sadness, meanness, and character. The looks, the mood-changes, the treatment they give each other and the way they strive to survive. After four years of observation we realised that what we were seeing was moving, in a new way, a story of life as well as wild scene. I wanted to communicate that.”

“Films that create an affinity with animals can help to ensure that we prioritise conserving them. Did you have this objective in mind when you made the film?”

“No! We want to take the viewers completely away from themselves. We will not have a voice-over commentary as yet, and we are undecided on where to put necessary explanation, but it is not about human intelligence. What we learnt from it was the clear and gruesome methods of survival. The ruthlessness, determination, affection, love, fear. That is how we found the story line, in the interaction, the strong and weak characters and how they live together.

Particularly fascinating to me was how the female cheetahs are driven to protect their young and fend for themselves in the treacherous environment with the lions. In other parts as with the blue whale young in Blue Planet, we see how and when the mother is driven to desert her young in her own effort to survive - how long it takes them to let the cub go. The film also compares the two challenges of living and breeding within a gang, and living as a solitary parent.”

“The things we expect to divide us from animals, the consciousness that they supposedly don’t have, the decision-making, liking and dislike, love and hatred, exists within any community.”

“All wildlife explanation is best when it increases compassion for animals. In many ways this film can teach human beings, not about their own lives or mind, but how most of what they do and respond to depends on survival and instinct, rather than intelligence. That is what I hope to achieve! We want to show that any animal community contains just as much of the complexities of human nature that we credit as being part of intellect and thought, and the human brain. Our study I believe showed similarities with the human relationships we form and the affiliations we value.”

“Since the earliest natural history documentary films, it has been very influential to include the human touch in some way, with music, commentary, or explanation. Natural scientists such as David Attenborough have set the example of always communicating not just the landscape, the place, the atmosphere, but their own affinity with the animals, which in turn moved people to understand the environment better and to understand animal similarities. Now you are moving away from this as a production team, what will be the biggest hurdle to promoting your film?”

“We specifically aim to reach audiences that would never dream of watching a documentary on television! The time constraints of people’s lives allow for entertainment to be allocated, and it must be a promise to be entertainment, and a break from the routine. We hope that for America in particular they will respond brilliantly to something presented as a full story, with a storyline, and the Disney sponsorship ensures the kind of publicity environmental issues need if we hope to help our wildlife and planet. We had to say yes! I hope it will mean that the next generation get involved in animal conservation as we are.”

‘Big Cats’ will be release across America in September of this year.

By Louis Jagger

Over the last few months, an unusual website has attracted thousands of viewers to discover more about one of the world’s most beautiful birds - the barn owl.

The website, Sportsman’s Paradise Online, has set up a live internet feed inside a barn owl nesting box. Viewers have watched the chicks grow from indiscriminately cute bundles of open-mouthed hunger into their current, almost fully-fledged state.

A barn owl

Another section of the website offers information about barn owls and the testimony of those who set up the camera, in San Marcos, California. Given the 59.000 Facebook shares, 4,000+ comments and 1,195 retweets, it’s safe to say that these owls have touched internet viewers in a way that few organised nature documentaries could have done.

And this nest isn’t the only one being transmitted freely across the internet. The Franklin Institute Hawk Nest cam is currently broadcasting on Ustream with a very young brood of red-tailed hawk chicks, a live chatbox full of enthused bird-lovers, and that all-important link containing more information about The Franklin Institute and its nest-observing project.

Quite what it is about birds of prey which so captures the imagination is up for debate, but on cuteness alone these unwitting internet superstars could charm their way into anyone’s precious internet routine. One might argue that this is an invasion of privacy, but as the birds are unaware of the camera, and grow up normally, it ought to be seen as an opportunity for regular people with a passing ornithological interest to inform and educate themselves upon the mysteries of avian youth. The joy of watching a helpless ball of down grow into a powerful, ruthless winged predator, live on your laptop screen, is a unique experience to say in the least.

And if you’re especially interested in this on-demand nature-viewing, the Sportsman’s Paradise Online site has a link to several other live wildlife cameras you can explore

By Jennifer Green and Julius Goldthorpe

Japanese Knotweed causes millions of pounds worth of damage to buildings and roads in Britain every year. If attempted, eradicating the weed using traditional methods would cost around £1.5 billion pounds. But scientists have Cab International think they have come up with a natural solution, a tiny psyllid from Japan. The bug, set to be released here this year, will be the first live agent introduced in Europe to control a weed…

By Smitha Mundasad

Sensors that could be implanted in the body to collect data about fracture healing are being developed by Turkish and American researchers.

“More than 10 per cent of fractures do not heal properly, but doctors are not able to see the bones healing, instead they have to make educated guesses,” said Emre Unal, a nanotechnologist at Bilkent University in Turkey.

X-ray of fractured femur. Image credit: Smitha Mundasad

In experimental models, sensors are applied to metal plates, similar to ones used by surgeons to fix fractures in place. The wireless sensors can then pick up information on the strain applied to them.

The nanotechnologists hypothesise that, over time, as bones heal and patients start to become mobile, less strain will be detected by the sensors as more will be taken up by the healing bone. When fully developed, they suggest, a doctor could monitor strain data over time to check whether a fracture is healing as expected. This important information could be obtained without scans and invasive procedures.

Experiments are currently taking place on sheep metatarsals in the US, which show promising results.

There are still, however, many barriers that need to be overcome if this is to become a clinically useful tool. “Sensors will need to be made of biocompatible material, and tests will have to take place on human bones,” explained Unal.

“Nanotechnological advances are set to make a huge contribution to medicine,” said Mohan, a Bristol surgeon.

By Tushna Commissariat

The illustrious Hubble Space Telescope (HST) recently celebrated its 20th anniversary, bringing to light one of the most celebrated and accomplished man-made scientific instruments. On April 24 this year, the HST officially completed 20 years in orbit, making it the most successful venture that NASA and the ESA have embarked upon.

The iconic Hubble image: the Pillars of Creation. Image credit: NASA, ESA, M. Livio and the Hubble 20th Anniversary Team (STScI)

On 24 April 1990, the Space Shuttle and crew of STS-31 launched the NASA/ESA Hubble Space Telescope into a low-Earth orbit. What followed was an epic era of the HST collecting some of the most fantastic images ever seen of the entire universe. Its many discoveries have aided and abetted astronomy, astrophysics and cosmology over the years, giving us visual proof for many things that were merely theoretical in the past. It wasn’t always a smooth curve, with the primary mirror being out of focus within a few weeks from launch, broken equipment, and a Space Shuttle rescue/repair mission that was cancelled. There was even talk of not reparing equipment a few times but the Hubble team of engineers, scientists and astronauts from NASA and ESA both proved time and time again that the HST had a lot more to give. To date, Hubble has looked at over 30,000 celestial objects. Its vast archives include over half a million pictures. The most recent renovation was carried out in May 2009, making the telescope 100 times more powerful than when it was launched.

Image celebrating HST 20th Anniversary: Image of the Carina Nebula. Image credit: NASA, ESA, M. Livio and the Hubble 20th Anniversary Team (STScI)

As a part of the celebrations, NASA, ESA and the Space Telescope Science Institute (STScI) decided on commemorating the date with a stunning new image. The Hubble anniversary image highlights a small portion of one of the largest observable regions of starbirth in the Galaxy, the Carina Nebula. Towers of cool hydrogen interwoven with dust ascend from the wall of the nebula. The scene is rather evocative of Hubble’s 1995 iconic image - “Pillars of Creation” taken by Jeff Hester and Paul Scowen .This image captures the top of a pillar of gas and dust, three light-years tall, which is being eaten away by the brilliant light from nearby bright stars. The pillar is also being pushed apart from within, as infant stars buried inside it fire off jets of gas that can be seen streaming from towering peaks like arrows sailing through the air.

Another very interesting aspect of the celebration is the Hubble Pop Culture contest, being conducted by the spanking new European website for HST. It calls to people from all over the world who have enjoyed Hubble images over the years to search for the images that have made their way into culture and arts, as seen in everyday life.

Further shots of the Carina Nebula; details of the 'Cosmic Pinnacle' shown. Image credit: NASA, ESA, M. Livio and the Hubble 20th Anniversary Team (STScI)

Also, Hubble fans can post a Facebook message or use the Twitter hashtag #hst20 or get onto the Hubble website and go to the “Messages to Hubble” page. There they can add their own messages or read selections from other messages. Fan messages will be stored in the Hubble data archive along with the telescope’s many terabytes of science data. The Hubble team hope to show future scientists just how much the telescope impacted our world and showed us, with extreme clarity, the awesome beauty of our universe.

By Jennifer Green

One of the few ‘critically-endangered’ Javan rhinos left in Vietnam has just been found shot dead by poachers, according to the World Wildlife Fund (WWF).

Rangers discovered the rhino carcass just over two weeks ago within Cat Tien National Park, South Vietnam, but they believe it could have been killed more than three months ago.

Possibly the rarest large mammal on earth, authorities believe there are less than 60 Javan rhinos existing in the wild and under five of these can be found in Vietnam.

A Dutch hunter with a dead Javan Rhino in 1895

One of the park officials, Bach Thanh Hai, said that the rhino had been shot through the leg before poachers removed its horn.

Rhino horn, believed by some to have healing properties, used to be traded legally for use in Traditional Chinese Medicines and Javan rhino population numbers rapidly declined as a result.

But in 1975, the Convention on International Trade in Endangered Species of Wild Fauna and Flora made the international trade of Javan rhino products illegal.

Yet surveys have discovered that the horn fetches a price as high as $30,000 per kg on the black market, encouraging poachers to continue hunting the species.

“This is a devastating development for the long-term prospects of this critically-endangered species,” said Barney Long, WWF Senior Program Officer for Asian Species.

“This loss is symbolic of the grim situation facing Vietnam’s many endangered species, including rhinos, elephants, tigers and the saola.”

Conservationists are now debating whether or not the Vietnamese population of Javan rhino has any chance of survival. Some say that the population could [still recover][ Go to WWF page on recovery], while others are arguing that rhinos will need to be introduced from the Indonesian population.

By Paul Rodgers

If it were up to me, magic would work. Much of my teens were spent in an imaginary land full of elves and dwarves, steeped in the lore of Tolkien’s The Lord of the Rings and games such as Dungeons & Dragons. Who could resist the idea that waving a wand or drinking a potion could solve life’s problems?

As an adult, though, I found that magic doesn’t work, and science does. Yet the NHS, an institution that should be a bastion of science, continues to spend millions of pounds a year – for remedies, staff and the upkeep of four specialist hospitals – on homeopathy, a practice with no scientific basis whose origins lie in Renaissance alchemy. At best, homeopathy is an expensive placebo, but in leaching scarce resources from treatments that are effective, and by distracting patients from seeking proper medical care, it causes real harm. That kind-hearted Britons are being encouraged to give money to pay for a group of homeopaths to go to Haiti to treat earthquake victims is scandalous.

Let’s be clear. Homeopathy is not the same as herbalism, which has some scientific merit. Its main principle, that “like-cures-like”, dates back to Paracelsus, a 16th century physician, astrologer and occultist who believed that if you suffered from, say, stomach cramps, the cure should be something that causes stomach cramps. The problem – obviously, you might think – was that this “cure” often made things worse. Two centuries later, Samuel Hahnemann, a German physician, realised that diluting the like-cures-like medicines reduced their toxic effects, though not, he claimed paradoxically, their efficacy.

And so homeopathy was born. Minute doses of the active ingredients are diluted so much that your chance of finding even one atom of it in your pricey sugar pills could be as low as one in a trillion. Exotic explanations for this vary widely, often involving the sort of pseudoscientific gobbledygook that is the stock in trade for Star Trek scriptwriters. One common idea is that water can “remember” which active ingredient used to be present (though apparently it forgets the myriad other contaminants that have been removed). As David Colquhoun, a professor of pharmacology at University College London, put it: “If homeopathy worked, the whole of chemistry and physics would have to be overturned”. Even some of the purveyors of these snake oils don’t have much faith in them. Paul Bennett, the professional standards director at Boots, one of the country’s biggest homeopathic retailers, admitted in November that “I have no evidence before me to suggest that they are efficacious.”

The Commons Science and Technology Select Committee – which reported on 22 February on its investigation into this “alternative therapy” – concluded that public funding for this hocus pocus should be cut. Even research into it should be abandoned as a waste of money. The MPs should go further. Homeopaths should be held legally responsible if they prescribe their placebos for conditions which demand proper medical attention. In Australia, two homeopaths, husband and wife, were jailed last autumn for gross criminal negligence over the death of their nine-month-old baby in 2002. The baby had severe eczema and died of septicaemia after her parents tried to treat her homeopathically. Even the placebo effect doesn’t work on babies.

Homeopaths will counter that they have several centuries worth of experience during which they’ve given their tonics to patients who have subsequently recovered. The flaw here is clear. Just because a treatment precedes a recovery does not mean it caused the recovery. Often patients seek help when their symptoms are worst, when the only way they could change is to get better. The argument that, in a free country, people should be allowed to choose what therapies they take is stronger, but only if patients are told the facts about those nostrums. And once they know that they’re getting a placebo, its effectiveness will mostly crumble. It has also been suggested that homeopathy helps GPs divert chronic time-wasters. Convenient, perhaps, but dishonest; like magic potions, lies have no place in a doctor’s black bag.

By Achintya Rao

India sent a team of students to the International Sustainable World (Energy, Engineering and Environment) Project [I-SWEEEP] Olympiad for the first time this year. The Olympiad was held between 14 April and 19 April this year. I spoke to Dr Arnab Bhattacharya, co-chair of the IRIS Scientific Review Committee that selects and guides the students, to ask him about the experience.

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I-SWEEEP

Image Credit: I-SWEEEP