Tuesday, January 19, 2010

A Scottish woman who set out before Christmas to purchase a turkey finally made it home on Monday, after being cut off by snow for a month. Kay Ure left the Lighthouse Keeper’s cottage on Cape Wrath, at the very northwest tip of Great Britain, in December. She was heading to Inverness on a shopping trip.

However on her return journey heavy snow and ice prevented her husband, John, from travelling the last 11 miles to pick her up. She was forced to wait a month in a friend’s caravan, before the weather improved and the couple could finally be reunited.

They were separated not just for Christmas and New Year, but also for Mr Ure’s 58th birthday. With no fresh supplies, he was reduced to celebrating with a tin of baked beans. He also ran out of coal, and had to feed the couple’s six springer spaniels on emergency army rations.

“It’s the first time we’ve been separated”, said Mr Ure in December. “We’ve been snowed in here for three weeks before, so we are well used to it and it’s quite nice to get a bit of peace and quiet.”

Friday, December 14, 2007

Reggie Bibbs is a 43-year-old-man living in Houston, Texas. Mr Bibbs was born with a genetic disease called neurofibromatosis (NF), which causes him to develop tumors on his body (see infobox on the right). NF can be a subtle disease, but in Bibbs’ case it has left him with a disfigured face and deformed leg. But he is happy with the way he looks, and doesn’t want to change his appearance to please other people. He has launched a successful campaign entitled “Just Ask”, and that’s just what Wikinews did in a video-interview.

The interview was prepared by Wikinews reporter Michaël Laurent with the help of Bertalan Meskó (who has a popular genetics and web 2.0 blog). Their questions were sent to a close friend of Mr. Bibbs, Lou Congelio, who kindly conducted the interview.

Sunday, August 20, 2006

400 Australian soldiers have been officially farewelled at parade in Darwin, NT, ahead of their deployment to Afghanistan on Tuesday. Wishing the soldiers well, Defence Minister Brendan Nelson says there is a high risk associated with the mission.

“We know that this is a dangerous mission but it’s also an extremely important one,” he said. “They will go beginning this week and be deployed over the next few weeks.”

The group will work around the southern Oruzgan Province. Rising violence in the Taliban heartland province earlier this month prompted Australian Prime Minister John Howard to further strengthen the capability of the Reconstruction Task Force (RTF). Approximately 150 personnel will be added to the 240-strong force announced in May.

Defence says the RTF will form part of the Netherlands-led Provincial Reconstruction Team in the Oruzgan province under NATO.

More than 1800 people have been killed in fighting in Afghanistan this year, 92 of them foreign soldiers (12 being Canadian). A contingent of 190 Australian special forces, supported by a 110-member helicopter detachment, has suffered a steady flow of casualties since September year, with 11 wounded — a rate of one a month. The Age reports the Howard Government has “kept secret” how soldiers suffered the wounds, or the extent or nature of the wounds.

Dr Nelson said the soldiers would perform command, construction, communications intelligence, protection and logistics support. “We must stick with our allies and stand up for our values,” he said. He told the troops they would be “dealing with people who are fanatically opposed to our way of life and everything we stand for”.

Dr Nelson says the Australian contribution will also include skills training for the local population to “ensure the benefits of the deployment continue long after our personnel have returned home.”

Monday, April 30, 2007

Prisoners in the Australian state of Queensland have been put to work manufacturing rainwater tanks to help meet a shortfall in supply.

The southeast corner of Queensland, which is currently undergoing one of its worst droughts on record, is experiencing a boom in the rainwater tank industry. Households, encouraged by subsidies introduced by the Beattie government, have enthusiastically begun installing rainwater tanks as well as other water-saving devices. These subsidies have led to a shortfall in supply however, with some households waiting months for tanks to be installed.

The new initiative, announced by Premier Peter Beattie as well as Corrective Services minister Judy Spence will see prisoners at Woodford Correctional Centre, Australia’s largest gaol, constructing tanks for AU$4 per day. Spence has pledged not to use the cheap labour to undercut existing tank suppliers. Beattie also pointed out that the programme would give prisoners constructing the tanks valuable work skills for when their sentences are completed. If the programme is successful, it may be extended to other gaols around the state.

The Beattie government has been increasingly criticised over recent months for its failure to handle the water crisis engulfing Southeast Queensland. Opponents accuse the Government of a lack of planning foresight with regards to water supply for the booming area, which includes state capital Brisbane, as well as other cities such as Ipswich, Toowoomba and Gold Coast.

Saturday, March 1, 2008

While nearly all coverage of the 2008 Presidential election has focused on the Democratic and Republican candidates, the race for the White House also includes independents and third party candidates. These parties represent a variety of views that may not be acknowledged by the major party platforms.

Wikinews has impartially reached out to these candidates, throughout the campaign. We now interview independent Presidential candidate Frank Moore, a performance artist.

[edit]

Tuesday, September 1, 2015

Nick Bos, of the University of Helsinki, studies “the amazing adaptations social insects have evolved in order to fight the extreme parasite pressure they experience”. In a recently-accepted Evolution paper Bos and colleagues describe ants appearing to self-medicate.

The team used Formica fusca, an ant species that can form thousand-strong colonies. This common black ant eats other insects, and also aphid honeydew. It often nests in tree stumps or under rocks and foraging workers can sometimes be spotted climbing trees.

Some ants were infected with Beauveria bassiana, a fungus. Infected ants chose food laced with toxic hydrogen peroxide, whereas healthy ants avoided it. Hydrogen peroxide reduced infected ant fatalities by 15%, and the ants varied their intake depending upon how high the peroxide concentration was.

In the wild, Formica fusca can encounter similar chemicals in aphids and dead ants. The Independent reported self-medicating ants a first among insects.

Bos obtained his doctorate from the University of Copenhagen. He began postdoctoral research at Helsinki in 2012. He also runs the AntyScience blog. The blog aims to help address “a gap between scientists and ‘the general public’.” The name is a pun referencing ants, its primary topic, science, and “non-scientific” jargon-free communication. He now discusses his work with Wikinews.

((Wikinews)) What first attracted you to researching ants?

Nick Bos Me and a studymate were keeping a lot of animals during our studies, from beetles, to butterflies and mantids, to ants. We had the ants in an observation nest, and I could just look at them for hours, watching them go about. This was in my third year of Biology study I think. After a while I needed to start thinking about an internship for my M.Sc. studies, and decided to write a couple of professors. I ended up going to the Centre for Social Evolution at the University of Copenhagen where I did a project on learning in Ants under supervision of Prof. Patrizia d’Ettorre. I liked it so much there I ended up doing a PhD and I’ve been working on social insects ever since.

((Wikinews)) What methods and equipment were used for this investigation?

NB This is a fun one. I try to work on a very low budget, and like to build most of the experimental setups myself (we actually have equipment in the lab nicknamed the ‘Nickinator’, ‘i-Nick’ and the ‘Nicktendo64’). There’s not that much money in fundamental science at the moment, so I try to cut the costs wherever possible. We collected wild colonies of Formica fusca by searching through old tree-trunks in old logging sites in southern Finland. We then housed the ants in nests I made using Y-tong [aerated concrete]. It’s very soft stone that you can easily carve. We carved out little squares for the ants to live in (covered with old CD covers to prevent them escaping!). We then drilled a tunnel to a pot (the foraging arena), where the ants got the choice between the food with medicine and the food without.

We infected the ants by preparing a solution of the fungus Beauveria bassiana. Afterwards, each ant was dipped in the solution for a couple of seconds, dried on a cloth and put in the nest. After exposing the ants to the fungus, we took pictures of each foraging arena three times per day, and counted how many ants were present on each food-source.

This gave us the data that ants choose more medicine after they have been infected.

The result that healthy ants die sooner when ingesting ROS [Reactive Oxygen Species, the group of chemicals that includes hydrogen peroxide] but infected ants die less was obtained in another way (as you have to ‘force feed’ the ROS, as healthy ants, when given the choice, ignore that food-source.)

For this we basically put colonies on a diet of either food with medicine or without for a while. And afterwards either infected them or not. Then for about two weeks we count every day how many ants died. This gives us the data to do a so-called survival analysis.

We measured the ROS-concentration in the bodies of ants after they ingested the food with the medicine using a spectrophotometer. By adding certain chemicals, the ROS can be measured using the emission of light of a certain wave-length.

The detrimental effect of ROS on spores was easy to measure. We mixed different concentrations of ROS with the spores, plated them out on petridishes with an agar-solution where fungus can grow on. A day after, we counted how many spores were still alive.

((Wikinews)) How reliable do you consider your results to be?

NB The results we got are very reliable. We had a lot of colonies containing a lot of ants, and wherever possible we conducted the experiment blind. This means the experimenter doesn’t know which ants belong to which treatment, so it’s impossible to influence the results with ‘observer bias’. However, of course this is proof in just one species. It is hard to extrapolate to other ants, as different species lead very different lives.

((Wikinews)) Where did the ants and fungus you used come from? How common are they in the wild?

NB For ants, see above about the collection.

This species of fungus does appear in Finland, but we chose to use a different strain from Denmark (with thanks to Prof. J. Eilenberg and the laboratory technician Louise Lee Munch Larsen from the University of Copenhagen). Animals can adapt to local strains (‘local adaptation’), and just to make sure we thought it would be good to use a strain of fungus that the ants definitely did not evolve specific resistances against. This means that the reaction of the ants (to self-medicate) is very likely to be a general response, and not just against their local fungal enemies.

((Wikinews)) Are there any ethical considerations around exposing ants to toxins and parasites?

NB Legally, no. Insects do not have any ‘rights’ as such regarding ethics. That said, we do take measures to not make them ‘suffer unnecessarily’. For example, dissections are done when the ants are anesthetized (either by CO2 or Ice), and when ants need to be killed, we do it in alcohol, which kills the ants in a matter of seconds. So while the ants do not have ‘rights’ as such, we still try to handle them with as much respect as possible (even though the experiment involves infecting them with a deadly fungus).

But even though the 12,000 ants in our study sounds like a lot (and it is), this is negligible in the ‘grand scheme of things’. It has been calculated that in the Netherlands alone, nearly a trillion insects die against just the licence-plates of cars every six months. I don’t own a car, so that means I’m excused right? 😉

((Wikinews)) This is the first evidence for self-medicating insects. How widespread do you think this phenomenon could be in reality?

NB It’s not actually the first evidence for self-medication in insects. Moths and fruit flies definitely do it, and there’s evidence in honey bees and bumble-bees as well. So it seems to be quite wide-spread in the insect world. I have no doubt that as time goes on, there will be more and more cases documented. Insects (and animals in general) seem to be quite good at taking care of themselves.

((Wikinews)) How might ants locate healing substances in the wild?

NB Very good question. This is something that’s important to know. If they would only do it in the lab, the behaviour wouldn’t be very interesting. We have some guesses where they might get it from, but at the moment we don’t know yet. That said, I plan to investigate this question (among others) further [in] the next couple of years.

((Wikinews)) For your PhD you researched ants’ scent-based communications. Could healthy ants perhaps tell other ants are infected and encourage this behaviour?

NB There’s not much known about this. There’s conflicting evidence about whether sick ants actually smell different from healthy ones or not. At the moment it seems that sick ants mostly take care of the problem themselves. Sick ants stop most interaction with nestmates and especially brood, and leave the nest to die in isolation. This is probably for reducing chance of infecting nestmates, but of course it also reduces the work load of their nest-mates, as their corpse doesn’t have to be dragged out etc.

So as an answer to the question, I would find it unlikely that such a behaviour would evolve, but it’s not known yet.

((Wikinews)) Ants generally avoided the peroxide if they were healthy, but in some circumstances might they try to build resistance against infection in advance?

NB Who knows? Also not known yet unfortunately. That said, there is a very interesting study about resin collection in ants. Wood ants collect tree-resin, which has anti-microbial properties. They collect this even if not infected, and when you infect them, they don’t collect more of the resin than normal. So basically it seems like they collect it in order to keep diseases out of the nest, so they stop the disease before it can actually infect them.

((Wikinews)) Are there plans to follow this research up? Might you research other species? Other substances?

NB I first want to find out where they get it from in nature. There might be many sources of medicine (recent evidence suggests that tobacco plays a similar role for bumble bees). Dalial Freitak, who is also on this paper is currently running tests with Ph.D. student Siiri Fuchs (who is also on the paper) with other substances to see if any have the same effect as H2O2 [hydrogen peroxide].

Once the behaviour has been well described in this species of ant, I might do a comparison with other species. For example, once we find the source of the medicine in nature… would species without access to this source also have evolved the same behaviour in the lab? And if so… where would they get it from?

Also… can ants medicate their friends? 🙂

((Wikinews)) What other research are you working on right now?

NB Phew…lots! 🙂

I still have some questions left unanswered from my Ph.D. work related to how ants recognize who is a friend and who isn’t. I also started collaborating with Prof. Michael Poulsen from the University of Copenhagen on immunity in fungus-growing termites, as well as their chemical recognition abilities. Furthermore we’re working on social parasitism in wood-ants (ants have lots of animals exploiting the nest for shelter and resources, which all somehow have to get in to the fortress without getting killed).