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CrowdScience

We take your questions about life, Earth and the universe to researchers hunting for answers at the frontiers of knowledge.

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Last Episode Date: 14 June 2024

Total Episodes: 392

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14 June 2024
Why are the seas salty?

Listener Julie lives close to the coast in New Zealand and wants to know why the water that washes up on the beach isn't fresh. How exactly does all that salt get into the world's oceans? In India, a country where salt became symbolic of much more than well-seasoned food, ho...

31 min
7 June 2024
How fast can a raindrop cross the globe?

CrowdScience listener Eleanor was lying in bed one rainy evening, listening to the radio. She lives in New Zealand, but happened to hear a weather forecast that told her it was raining in the UK too. She started wondering: could it be the same rain falling there and outside ...

26 min
31 May 2024
Why does wine taste better over time?

It’s often said that fine wine gets better with time, and this week’s oenophile listener Jeremy has a cellar full of dust-covered bottles. He is curious whether chemistry can account for the range of flavours that develop as wine matures, but also wonders why some of it ...

30 min
24 May 2024
Will mountains shrink as sea levels rise?

The Blue Ridge Parkway is 469 miles of beautiful vistas, a mountainous road that winds from Virginia to North Carolina in the USA. The route is peppered with elevation signs, telling you how many metres above sea level you are. Which has CrowdScience listener Beth wondering:...

26 min
17 May 2024
What does prayer do to my brain?

Prayer and meditation are key features of religious and spiritual practices around the world, suggesting they’re intimately linked to the human condition. But what is going on in the brain during prayer? And is praying beneficial for our mental health? CrowdScience listene...

28 min
10 May 2024
Why are people still dying from malaria?

Mosquitoes are responsible for more human deaths than any other animal. These tiny creatures transmit many diseases, but the most devastating is malaria. It kills over half a million people every year, most of them children. So why are people still dying of malaria in such l...

27 min
3 May 2024
Why am I bad at maths?

When CrowdScience listener Israel from Papua New Guinea received a bad grade on a maths test in third grade, he looked around the class and realised that almost all the other students had received a better result. Since then, he has always wondered: why are some people bette...

30 min
26 April 2024
How should we protect our coastlines?

Coastlines around the world are changing, causing serious problems for the many communities living near the sea, as well as vital and fragile coastal ecosystems. In the second of a two-part special on coastal erosion, CrowdScience explores the best ways to tackle this proble...

26 min
19 April 2024
Are our coastlines being washed away?

Around the world, coastlines are constantly changing due to the power of waves, currents and tides. Coastal areas are also some of the most heavily populated and developed land areas in the world. So it’s not hard to see how the natural process of coastal erosion can cause...

26 min
12 April 2024
How do my ears sense direction?

How do we know where a sound is coming from? Another chance to hear this ear-opening episode, exploring a question from CrowdScience listener Chiletso. One day, he heard his son bounce a ball and instantly knew the direction it was travelling. How? Anand Jagatia sets out to ...

32 min
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