An analysis of Covid-19 data from South India shows children more than any other group are transmitting the virus both to other children and adults, Epidemiologist Ramanan Laxminarayan tell us the data also shows the situations in which the virus is most likely to spread, public transport is of particular concern.
The WHO has launched an initiative to roll out rapid testing, particularly to countries that don’t have access to lab based tests, Catharina Boehme who leads one of the WHO’s partner organisation in the project tells us the test, which looks similar to home pregnancy tests should give results within fifteen minutes.
Andrea Crisanti led a ground-breaking testing initiative in Italy which eliminated Covid-19 in a small town in a matter of weeks. We look to the lessons learned.
And in California residents have been in a kind of self- enforced lockdown, not because of Covid – 19 but due to wildfires fires. Molly Bentley from the Seti Institute podcast ‘ Big Picture Science’ tells us about how the fires have created an atmosphere of toxic smoke, even in the cities.
Also, What makes things sticky? Listener Mitch from the USA began wondering while he was taking down some very sticky wallpaper. Our world would quite literally fall apart without adhesives. They are almost everywhere – in our buildings, in our cars and in our smartphones. But how do they hold things together?
To find out, presenter Marnie Chesterton visits a luthier, Anette Fajardo, who uses animal glues every day in her job making violins. These glues have been used since the ancient Egyptians –but adhesives are much older than that. Marnie speaks to archaeologist Dr Geeske Langejans from Delft University of Technology about prehistoric glues made from birch bark, dated to 200,000 years ago. She goes to see a chemist, Prof Steven Abbott, who helps her understand why anything actually sticks to anything else. And she speaks to physicist Dr Ivan Vera-Marun at the University of Manchester, about the nanotechnologists using adhesion at tiny scales to make materials of the future.
An analysis of Covid-19 data from South India shows children more than any other group are transmitting the virus both to other children and adults, Epidemiologist Ramanan Laxminarayan tell us the data also shows the situations in which the virus is most likely to spread, public transport is of particular concern.
The WHO has launched an initiative to roll out rapid testing, particularly to countries that don’t have access to lab based tests, Catharina Boehme who leads one of the WHO’s partner organisation in the project tells us the test, which looks similar to home pregnancy tests should give results within fifteen minutes.
Andrea Crisanti led a ground-breaking testing initiative in Italy which eliminated Covid-19 in a small town in a matter of weeks. We look to the lessons learned.
And in California residents have been in a kind of self- enforced lockdown, not because of Covid – 19 but due to wildfires fires. Molly Bentley from the Seti Institute podcast ‘ Big Picture Science’ tells us about how the fires have created an atmosphere of toxic smoke, even in the cities.
Sociologist Alondra Nelson calls it “root-seeking” – individuals wanting to know their ethnic background. Knowing who your people were as a way to know who you are verges on being a human need – witness the Hebrew Bible or the carefully tended genealogies of royal houses.
In this Social Science Bites podcast, Nelson describes her particular interest in those root-seekers whose journeys usually aren’t captured in antebellum church registries or in tales passed down in the same hamlet through countless generations. She's focused on the descendants of people 'stolen from Africa' in the slave trade, who make up so much of the African diaspora.
In surveys and later in extensive interviewing among the African-American community, Nelson found a great deal of interest among Black Americans in DNA testing despite some historical misgivings.
“Marginalized communities, and in the context of the U.S., African-Americans in particular, have a very understandable historic distrust of genetic research and medical experimentation,” she explains to interviewer David Edmonds. “So the fact that African Americans were early adopters in this space is surprising given that history. What’s not surprising is the genealogical aspiration that many African Americans are trying to fulfill – a profound and pronounced and often very living and present longing sense of loss and longing about identity, original family names, of points and places on the continent of Africa where one’s ancestors might have come from.”
She also learned, as her investigations branched out from surveys of the genealogical community to interviews with test-takers, that “getting the test results was really the beginning of the endeavor, rather than the end.
“What in the world did you think you could do with this information, besides filing it away in a drawer and telling your family that we now know that we have Ibo, Yoruba, whatever the test provided for ancestry?” Answering that question meant Nelson’s own approach must evolve.
“That transformed the methodology to a kind of ethnographic methodology that I call the ‘social life of DNA’ in which I followed what happened with the test, what happened with the information, what did they think that these genetic inferences could do with the world. That really opens up a whole other space of thinking about the importance of genetic testing.”
Part of that space she explored is uniquely American. For much of (White) America, one’s ethnic ties to the ‘old country’ – to be Irish or Italian, say -- are a linchpin of identity. “That’s not been available to African Americans,” she notes, whose roots are assigned to an amorphous blob of sub-Saharan Africa, since specific roots were eradicated when now enslaved peoples arrived in the New World. “People lost their given names, lost the languages of their foremothers and forefathers,” Nelson said.
“[P]art of the work of what slave-making entailed was taking people from often very different places on the continent of Africa, with different languages, cultural norms, religious backgrounds and to create out of a multicultural and multiethnic diverse group of people of different backgrounds a ‘caste’.” The dark-skinned newcomers were henceforth categorized as a race, and that race was assigned the caste of enslaved person.
Genetic testing, in turn opens up that ‘Black box’ of lost identity and reveals what place and culture forebearers were likely ripped from. (Nelson, for example, had her own code analyzed and discovered a component of her heritage was from what is now Cameroon.)
In this podcast, Nelson also talks about how Black Americans may respond to their growing awareness of their specific genetic identities, how this might impact the reparations debate in the United states, and why people are primed to be emotional at reveals of their genetic heritage.
Some of the most prestigious scientists in history advanced racist and eugenicist views. But why is that rarely mentioned in textbooks? Today on the show, we speak with science educators building an anti-racist perspective into their curriculum and seeking to make the science classroom more inclusive.
Fueled by climate change, hurricanes are becoming stronger and more frequent. Those storms have repeatedly led to spills and fires at chemical manufacturing plants along the Gulf Coast.
But can companies — and the people who work for them — be held responsible or even sent to prison for failing to adequately prepare for climate change?
NPR's Rebecca Hersher reported on that question, which is at the center of a recent lawsuit.
A recent CDC report estimates Native Americans and Alaskan Natives are 3.5 times more likely to get COVID-19 than white people, and those under 18 are more likely to test positive.
This report is the first time the federal government has released hard numbers on the coronavirus in tribal nations, but it is most notable for what it does not say about how the virus is affecting Native Americans and Alaskan Natives. And some scientists believe that the CDC's current numbers are an underestimate.
Jourdan Bennett-Begaye, reporter and deputy managing editor of Indian Country Today, explains why the CDC data is so limited in scope — and her efforts to bring more data transparency to the table.
Jourdan wrote about the CDC's findings here. Support the work of Indian Country Today here.
While vaccines against Covid -19 are being developed at unprecedented speed, none of them have been tested to see if they can actually stop transmission of the virus. They are designed to stop those who are vaccinated from developing Covid -19 disease, but not becoming infected.
This says Virologist Malik Peiris from Hong Kong University means while vaccinated people themselves may be protected they might also spread the virus.
Cells produced in the bone marrow may be responsible for an extreme immune response to Covid 19 in some people. Immunologist Lizzie Mann from Manchester University says this finding may help predict who will develop serious disease symptoms, and also provide a target for future treatments.
Extreme ice melt in the Arctic this summer may have a long term impact on the region says glaciologist Julienne Stroeve. She spent the winter in the Arctic and tells us about the environment she encountered.
And climate change is also impacting the tropics, research in Gabon from Ecologists Emma Bush and Robin Whytock shows a reduction of the amount of fruit available which is now impacting the health of forest elephants.
And why am I embarrassed to be naked? Chumbuzzo in Zambia wonders. And what would happen if we ditched our clothes and embraced nudity? Presenter Anand Jagatia and Producer Caroline Steel spend the day naked with other naturists to see if they can shift their embarrassment.
Maybe there are good evolutionary reasons to cover up or perhaps we are contributing to inequality and negative body image by hiding our real selves? Marnie Chesterton explores different cultural attitudes to nudity and finds out about the science behind embarrassment. Clothes optional.
Why am I embarrassed to be naked? Chumbuzzo in Zambia wonders. And what would happen if we ditched our clothes and embraced nudity? Presenter Anand Jagatia and Producer Caroline Steel spend the day naked with other naturists to see if they can shift their embarrassment.
Maybe there are good evolutionary reasons to cover up or perhaps we are contributing to inequality and negative body image by hiding our real selves? Marnie Chesterton explores different cultural attitudes to nudity and finds out about the science behind embarrassment. Clothes optional.
Presented by Marnie Chesterton. Produced by Caroline Steel for the BBC World Service
NPR Science Correspondent Jon Hamilton gives us an update on those mighty mice that went into space this past winter. The results could have big implications for the future of space travel.
