It's a topic that's taboo in many cultures, yet it's also something nearly every woman experiences – on average upwards of 400 times throughout her life: menstruation.
Responding to a flood of questions from our CrowdScience listeners, Marnie Chesterton seeks to unpack how periods affect women physically, mentally and societally.
Why did humans evolve to have periods when fewer than two percent of mammals share our experience of menstrual cycles? Is it really a good use of our limited energy reserves? What can the little Egyptian spiny mouse teach us about PMS symptoms? We hear why periods may reduce the number of faulty embryos that implant and how more menstrual cycles may even increase our chances of developing certain types of cancer.
Finally, as the number of periods a woman has over the course of her life has more than quadrupled since the pre-industrial era, Marnie asks: Do we really still need to have them?
Contributors:
Dr Nadia Bellofiore, Hudson Institute of Medical Research at Monash University
Dr Deena Emera, Buck Institute
Lameck Kiula, Jambo for Development
Sally King, Menstrual Matters & King's College London
Dr Diana Mansour, New Croft Centre & Newcastle University
Presented by Marnie Chesterton
Produced by Sam Baker and Melanie Brown for the BBC World Service
There's big change that's happening in the field of artificial limbs: artificial limbs that both move — and feel. NPR correspondent Jon Hamilton explains why touch is so important for people who are trying to control a state-of-the art robotic arm or a prosthetic limb.
Researchers map where the riskiest areas are for viruses to jump from bats into humans. Also, synthetic bacteria with unnatural DNA, and the origin of the humble watermelon.
David Hayman of Massey University in NZ and colleagues have published in the journal Nature Food a study highlighting areas of the world where zoonotic transmission of coronaviruses are most likely to occur between humans and bats of the type most suspected of being the origin of the current SARS CoV2 virus. There are a lot of hotspots combining fragmented forest, livestock farming, human habitation, and populations of horseshoe bats. It is, as he says, just part of the evidence suggesting a natural origin in the areas of northern south-east Asia and southern China.
Jason Chin, Wes Robertson and team at the Laboratory of Molecular Biology have been tinkering with their work on synthetic organisms. By rewriting the dictionary of DNA itself, their new molecular alphabet is able to encode far more elaborate and innovative functions than even nature has ever produced. Publishing this week in the journal Science, their latest bacterium is even capable of being completely immune to viral infection. But as they describe, this could be just the start of what the new technology could deliver in terms of new materials and medicines.
Meanwhile, Susanne Renner has been tracking down some of human beings’ earliest genetic engineering. The selection and breeding of various fruits to produce sweet, sweet watermelon was long suspected to have originated in Africa, the question was where and when? Using a combination of genetic sequencing, ancient Egyptian art, and early modern paintings, she describes to Roland how what we now know as Sudan likely played a part in the story.
(Image: Horseshoe bat Credit: Getty Images)
Presented by Roland Pease
Produced by Alex Mansfield
Short Wave reporter Emily Kwong speaks with Janina Jeff, the host and executive producer of In Those Genes, a "science and culture podcast that uses genetics to decode the lost histories of African descendants." They discuss what a person's genetic ancestry test does and does not reveal, and the complicated intersection of genetics, history and race.
Researchers say the concept of achieving herd immunity threshold isn't the right finish line to end the pandemic. It's an elusive number to define in the first place, and it changes under various circumstances. Science correspondent Geoff Brumfiel talks with Maddie about the complexities in even defining the number and what the public should focus on instead.
Happy Pride, Short Wave Listeners! Here's a fun episode from our archives to celebrate the month!
It's another "Back To School" episode where we take a concept you were maybe taught in school as a kid, but didn't really learn or just forgot. Short Wave producer Thomas Lu and host Maddie Sofia go on a journey to explore what a rainbow exactly is and how we see them! We all remember ROY G BIV, right?
The latest Nyiragongo eruption was not entirely unexpected, the volcano’s lava lake inside the crater had been building up for years. Local volcanologists say it was only a matter of time before an eruption occurred. The big concern was where the flank of the volcano would be breached as the city of Goma rests under the volcano and there are potential fissures even within the town.
However there are still questions over the effectiveness of seismic monitoring in the area, North Kivu. The Goma observatory has been unable to carry out this work due to a lack of funding. And monitoring is further complicated by the region’s long running civil war, with rebel groups often camped around the volcano.
We hear from Dario Tadesco and Cindy Ebinger. Who have both been monitoring developments.
Cyclone Yass was the second Cyclone to hit India within a week. Are these events becoming more common and are they related to rises in global temperatures? Climatologist Roxy Koll has been monitoring the situation.
Greenland’s pristine glaciers might not be so pristine. Jemma Wadham from Bristol university and her team have found unexpectedly high levels of Mercury in meltwaters - similar to those from industrial pollution. They say research now needs to focus on the impact for wildlife and people in the Arctic region.
And the elusive Sowerby’s beaked Whale doesn’t travel very much despite pockets of the species being found across the Atlantic. Kerri Smith has been researching this species, which is rarely seen alive. Using samples from whales beached or caught accidentally she was able to build up a picture of their distribution.
As millions more of us move to live in densely populated cities, we almost inevitably face living in closer proximity to our neighbours. Neighbour noise can certainly be a source of annoyance – but could it even be damaging to our health?
Increasing evidence suggests that unwanted noise can cause sleep deprivation, distraction and annoyance, as presenter Anand Jagatia finds out. He discovers that noise annoyance has a small but significant impact on our wider health – including our cardiovascular system – but that annoyance is not necessarily down to sound alone. Factors such as perception of the neighbourhood and relationships with our neighbours also play a part.
CrowdScience has examined living with unwanted noises before, and we revisit our trip to the acoustics lab at the University of Salford in Manchester, UK. Here, we meet the researchers and engineers investigating the best ways to make our homes more pleasant for our ears whilst still maintaining the ‘buzz’ of city life.
As millions more of us move to live in densely populated cities, we almost inevitably face living in closer proximity to our neighbours. Neighbour noise can certainly be a source of annoyance – but could it even be damaging to our health?
Increasing evidence suggests that unwanted noise can cause sleep deprivation, distraction and annoyance, as presenter Anand Jagatia finds out. He discovers that noise annoyance has a small but significant impact on our wider health – including our cardiovascular system – but that annoyance is not necessarily down to sound alone. Factors such as perception of the neighbourhood and relationships with our neighbours also play a part.
CrowdScience has examined living with unwanted noises before, and we revisit our trip to the acoustics lab at the University of Salford in Manchester, UK. Here, we meet the researchers and engineers investigating the best ways to make our homes more pleasant for our ears whilst still maintaining the ‘buzz’ of city life.
Contributors:
Contributors:
Professor Charlotte Clark, St George’s University of London
Professor Trevor Cox, University of Salford Manchester
Professor Bill Davies, University of Salford Manchester
Dr Mags Adams, University of Central Lancashire (formerly University of Salford Manchester, at time of recording)
Produced by Jen Whyntie and presented by Anand Jagatia for the BBC World Service.
Scientists and students with disabilities are often excluded from laboratories — in part because of how they're designed. Emily Kwong speaks to disabled scientist Krystal Vasquez on how her disability changed her relationship to science, how scientific research can become more accessible, and how STEMM fields need to change to be more welcoming to disabled scientists.
The latest Nyiragongo eruption was not entirely unexpected, the volcano’s lava lake inside the crater had been building up for years. Local volcanologists say it was only a matter of time before an eruption occurred. The big concern was where the flank of the volcano would be breached as the city of Goma rests under the volcano and there are potential fissures even within the town.
However there are still questions over the effectiveness of seismic monitoring in the area, North Kivu. The Goma observatory has been unable to carry out this work due to a lack of funding. And monitoring is further complicated by the region’s long running civil war, with rebel groups often camped around the volcano.
We hear from Dario Tadesco and Cindy Ebinger. Who have both been monitoring developments.
Cyclone Yass was the second Cyclone to hit India within a week. Are these events becoming more common and are they related to rises in global temperatures? Climatologist Roxy Koll has been monitoring the situation.
Greenland’s pristine glaciers might not be so pristine. Jemma Wadham from Bristol university and her team have found unexpectedly high levels of Mercury in meltwaters - similar to those from industrial pollution. They say research now needs to focus on the impact for wildlife and people in the Arctic region.
And the elusive Sowerby’s beaked Whale doesn’t travel very much despite pockets of the species being found across the Atlantic. Kerri Smith has been researching this species, which is rarely seen alive. Using samples from whales beached or caught accidentally she was able to build up a picture of their distribution.
