The Naked Scientist explains zika virus, airplanes, allergies and voices

702 listeners satisfied their curiosity about the world by throwing science questions on any subject to the doctor and scientist.

Listen to Dr. Chris Smith answering questions from listeners during the Redi Tlhabi show below...

The reason that airoplanes fly forward is because of the way wings work to create lift and birds are gonna be a little bit similar. An airoplane wing and bird's wing work by pushing air in one direction, and if you push air in one direction the air generator force on you in the opposite direction pushing upwards.

Dr Chris Smith, lecturer in virology at Cambridge University, UK

The reason we have allergy is because there are proteins, which are chemicals, in things in the world around us to which we have developed some kind of anti-body (called IGE) response.

Dr Chris Smith, lecturer in virology at Cambridge University, UK

The shape of your mouth and also the shape of your head dictate what frequencies get amplified best. And this is why we all have different sound voices.

Dr Chris Smith, lecturer in virology at Cambridge University, UK

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