And the This week our panel of experts are teaming up to tackle the bizarre and

brain-bending questions you've been sending in, including,

is it really bad to crack your knuckles?

What does science have to say about free will?

And do squirrels ever forget where they've buried their nuts? I'm Katani and this is the Naked

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

Let's start by meeting the team who are here to answer your questions. We've got one of our regulars,

Ginny Smith.

She's always ready to decode the mysteries of the mind.

We have Max Gray, he's a marine biology PhD student at Cambridge University.

He can field any questions about animals, birds and fish, or if you'd really like to put him through his

paces, plants, how about that Max?

And we're also joined by Hugh Hunt, he's our engineering expert from Cambridge University, and of course the erstwhile Dr Chris Smith

he's a medical doctor but can take questions about pretty much anything and with my own

hat on I can answer any questions about genetics and cancer so if you'd like to get in touch you

can tweet at naked scientists or email Chris at the naked scientist dot com and now our

first question we have in is for you Chris let's go.

Hello naked scientist my name is Eva whohanguzzi from Kampala Uganda and I just wanted to know

is cracking your knuckles bad for you? People have linked it to arthritis and yeah I'm just curious because I crack my knuckles a lot.

Let's do a quick straw poll in the studio who can crack their knuckles I can't I've got kind of

clicky wrists but anyone? Yeah I can crack my knuckles.

Go on mouse.

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