Science Podcasts

Naked Scientists episode

Sun, 26th Feb 2012

Can a Mobile Phone Compromise your Sperm Count?

What's the point of earwax? Does WiFi damage the brain? Can a mobile phone in a trouser pocket dent a man's fertility? In this week's science Q and A show we also brush up on how they get the stripes in toothpaste, discover whether dropped food follows the 5 second rule and shed light on why some forms of EM radiation more damaging than others. Plus, news of a new microscopic MRI machine for molecules, how computer games can alleviate the symptoms of schizophrenia and why what a woman eats, even before becoming pregnant, can have a lifelong genetic legacy for her offspring...

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In this edition of Naked Scientists

Full Transcript

  • 01:35 - Are primary colours in pigment and light different?

    If you ask me what the primary colours are, I'd say Red, Green, Blue. They are often shown on TVs and Computer Screens. Ask any artist, I've just had a conversation with one, and they will insist they are Red, Yellow, Blue - after all, you have to mix blue and yellow to get gr...

  • 03:56 - Why is phone-echo so distracting?

    Hi Chris I was on a video call today. That was bad enough. What was worse, however, is that when speaking to the people at the far end, I could continually hear my own voice echoed at their end, This meant I would start speaking, hear myself, and then not be able to easily con...

  • 06:07 - Does wifi alter the brain?

    Hello gang, Recently read an article on effects of wifi on the brain, especially small children and while there seems to be a strong debate over the findings, I've become a bit concerned. Our 3 yr. old son Gus attends preschool where the admin. use wifi, so I have curtailed us...

  • 09:14 - Micro MRI

  • 11:54 - How can you blow hot and cold?

    Hi Chris My ten year old son Joshua Woolf asked me why the air that you breathe out when you blow out candles is cold as opposed to the arm air that you breathe out when you want to mist a window. I explained that the warm air comes from inside your body and the colder air i...

  • 13:30 - Why does calcium indicate nerve cell health?

    Why do scientists use calcium as an indicator of the overall health of a nerve cell?

  • 14:08 - How long does something need to be in contact with the floor to pick up germs?

    Hello Naked Scientists! I listen to your podcast here in Austin, Texas, USA. Around here parents have a "two second rule" for food that has fallen on the ground. The idea is that if the food item has been on the ground for less than 2 seconds it has not had enough time to ...

  • 16:14 - Losing Air

    A classic experiment showing what happens to air from a candle when it is enclosed.

  • 35:57 - Scanning the Sea from Space

    Building an instrument to fly on board a satellite is a feat of precision engineering. Itís got to be robust enough to withstand the launch, sophisticated enough to produce new science and Ė since you canít easily call out a repairman Ė very reliable. We find out how they're t...

  • 41:18 - Why do we have earwax?

    Dear Naked Scientists, I'm in the U.S. and I LOVE LOVE your podcast. I listen to it while I work -- I'm a graphic designer, so when your program is on I've got sort of a left-brain/right-brain thing going on. Anyway, I was wondering why we have earwax. What's it for and how...

  • 55:22 - Can modern genetic techniques make new species?

    As the joke goes...if you cross a kangaroo with a sheep you get a wooly jumper. Is it now possible with modern techniques to cross different animals to make one completely new species? PS The show is awesome, keep up the good work. Vinny Rochdale, Greater Manchester.

  • Plant frozen for 30,000 years revived

    A plant frozen in Siberia for over 30,000 years has been brought back to life by scientists in Russia.

 

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