And the Hello, welcome to the naked scientists. This week it's Q&A time you ask the

questions and we supply the answers. Coming up, does pregnancy alter a mother's DNA?

The dogs and other animals have blood groups like humans do.

Is there an ideal amount of gravity that's needed to sustain life and why do so many scientists start

their sentences with the word so so stay tuned for those and other answers.

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

Let's meet the team.

Kat Arnie works for Cancer Research UK.

She's also very busy writing a book all about genetics.

That comes out next year.

You can look forward to that.

She's going to be grappling with your DNA-related queries.

Ewen Keller is from the Cambridgeshire-based engineering company T-W-I,

he'll be looking at the materials and the chemicals that make up the world around us.

Ginny Smith is interested in how the brain works,

and I'm Chris Smith, I'm a medical doctor.

So if you'd like to get in touch with us you can tweet at naked scientists or you can email

Chris at the naked scientist.com.

Cat let's kick off with this one for you, Justin Chambley, has said I recently saw a movie called

Splice.

It's a Canadian French science horror film directed by Vincenzo Natale and it stars Adrian Brody and Sarah Polly.

They portray a young scientist couple who are choosing to introduce human DNA into their

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