CrowdScience

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Episodes

Date Title & Description Contributors
2025-02-21

  Why isn't the sky green?

Vermillion red, vibrant orange, golden yellows, even violet – we're enchanted by the colours that make up a stunning sunset or sunrise. CrowdScience listener Paulina, a lighting designer from Chile, often uses the sunsets she sees from her balcony as i...
  BBC World Service author
2025-02-14

  Is anything truly random?

CrowdScience listener Dorit has a problem. She wants the tiles in her new bathroom to be arranged randomly but, no matter what she does, it still looks like they form some kind of pattern. This has got Dorit thinking about randomness – what is it, how ...
  BBC World Service author
2025-02-07

  Why can't I remember my early childhood?

Some of our biggest achievements happen in the first years of our lives. Taking our first steps, picking up a complex language from scratch, and forming relationships with some of the most important people we’ll ever meet. But when we try to remember t...
  BBC World Service author
2025-01-31

  Is my smartwatch good for my health?

Smartwatches are increasingly popular: around the world many of us use these wearable devices to monitor our performance and improve our fitness. But how reliable is the data they collect, and can they actually make us healthier? CrowdScience listener ...
  BBC World Service author
2025-01-24

  How high can birds fly?

While watching a feisty cockatoo chase after a hawk, CrowdScience listener Alison saw the hawk catch a thermal and rise effortlessly into the sky. The cockatoo gave chase, but the hawk climbed higher and higher until it became just a tiny speck, barely...
  BBC World Service author
2025-01-17

  Which animal has the biggest carbon footprint?

Carbon footprints are a measure of how much we each contribute to the greenhouse gases that warm the Earth’s atmosphere. The global average of carbon dioxide emissions is nearly 5 tonnes per person per year, although it can be triple that in certain co...
  BBC World Service author
2025-01-10

  Is beer better without alcohol?

In the past stout beer has been touted for its supposed health benefits. Is there any truth to those claims - and what happens if you take the alcohol out?CrowdScience listener Aengus pondered these questions down at the pub, after noticing most of his...
  BBC World Service author
2025-01-03

  Why am I embarrassed when I fall?

When listener Diana fell on a run on her birthday, her first instinct was not to check her bruised hand, but instead to get up as quickly as possible and act as if nothing had happened. She felt embarrassed. Meanwhile, her son Marley loves to watch fai...
  BBC World Service author
2024-12-27

  I didn’t know that!

Did you know that flies fly in rectangles, fish hide by lighting themselves up and the moon is lifting the ground underneath your feet? Anand Jagatia quizzes members of the CrowdScience team on the moments from the past year that had them scratching th...
  BBC World Service author
2024-12-20

  Will the Earth ever lose its Moon?

The Moon has always sparked human curiosity. It governs the tides and biological rhythms. It’s inspired myths and stories. It’s inspired us to reach out and explore it. And it's certainly inspired CrowdScience listeners, who have sent us a host of ques...
  BBC World Service author