The Hello, Hello and this week why biofuels cost the earth how a neutron star proved good old

Einstein right and what our voices tell you about our body shape.

Plus what is a legal high?

And where do these new drugs come from?

How are they detected?

And how do scientists discover what they do to use as brains?

If you'd like to get in touch with us here at the

naked scientist then you can email studio at the naked scientists dot com

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The Naked Scientists podcast is powered by UKfast.co.uk.

And joining Hannah and me for a look at what's making science headlines this week, apart

from the fact that it is the 60th anniversary of the discovery of DNA, are Neil Withers, he's from Chemistry World magazine,

science journalist Mark Peplo,

and Laurie Winkless from the National Physical Laboratory.

Hello to all of you.

Neil, first up, biofuels, a new report is suggesting that the arguments

are not all that compelling.

That's right, there's a report out from Chatham House which suggests that Biofuels, which

are supposed to be a low carbon green alternative to the fuels that we dig out of the ground

aren't as good as we thought they are. Why not?

Unfortunately there's a number of reasons why not.

For a start, they destabilise the food chain because to grow them, you have to use fields that you would

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