Jun 7: Eradicating plagues forever, and more...
Sodium fuel cell, plants hear pollinators, penguin poop cools Antarctica, and giant sloths
On this week's episode of Quirks & Quarks with Bob McDonald:
Researchers have developed a new sodium metal powered fuel cell with up to triple the output for its weight of a lithium-ion battery. The team from MIT, including Yet-Ming Chiang, think these fuel cells could have enormous potential for electric vehicles — including flight. They say sodium can be electrically produced from salt on a large scale to facilitate this technology. The research was published in the journal Joule.
A new study has found that plants can respond to the distinctive vibrations of pollinating insects by activating sugar-producing genes to produce rich nectar. In contrast they respond to the sound of nectar-stealing non-pollinators by cutting back on sugar. Francesca Barbero, from the University of Turin in Italy, presented this work at a recent joint meeting of the Acoustical Society of America and 25th International Congress on Acoustics.
Penguin guano is rich in ammonia, and when it accumulates in penguin rookeries in Antarctica, that ammonia is released into the atmosphere, encouraging cloud production. Those clouds reflect sunlight into space, but can also trap sunlight reflected from the ice, so have complex climate interactions. This connection was discovered by University of Helsinki researcher Matthew Boyer, and was published in the journal Nature.
Sloths used to be giants the size of bears and even elephants before disappearing around 12,000 years ago. An international group of paleontologists including University of Toronto's Gerry De Iuliis have assembled a comprehensive family tree of the sloth to understand how a group that used to dominate the landscape was winnowed away to only a handful of relatively small, tree dwelling species. The research was published in the journal Science.
In 1980 the World Health Organization declared Smallpox officially eradicated, meaning that for the first time, a plague that killed hundreds of millions of people had been eliminated by human ingenuity. It opened the question of whether we could do this for other lethal threats? We look at efforts to eradicate Polio, an ancient plague, and HIV, a more modern epidemic, to understand how researchers are trying to eradicate these diseases , how close they've come, and what's preventing their final victory.
Quirks spoke to Stan Houston, an infectious disease specialist and professor of medicine and public health at the University of Alberta in Edmonton. He's worked on treating HIV and tuberculosis in places such as Zimbabwe, South Sudan, Ecuador and Alberta.
Catherine Hankins was the chief scientific adviser for the Joint United Nations Program on HIV/AIDS in Geneva, Switzerland. In 2013, she was named to the Order of Canada. She is currently an adjunct professor at the School of Population and Global Health at McGill University and a senior fellow at the Amsterdam Institute for Global Health and Development.
