Stripping down science, the naked scientists.

Hello, welcome to this week's edition of the naked scientists.

It's our question and answer program with me, Chris Smith, and also be Dave Ansel. Hello Dave. Hello Dave.

Hi Chris.

Now coming up this week, scientists have uncovered the origin of the asteroid that wiped out the

dinosaurs over 65 million years ago and worse still, some of it still up there in space find out

where it is and whether it's going to make a return journey. Also scientists have

come up with a way to trigger nuclear fusion here on Earth and also we'll be

finding out why breastfeeding and smoking is bad

news for babies. Plus we're trying to find out how astronauts can keep control of

their stomachs in low gravity conditions. Given the gravity is required to separate the gases from liquids and solids in your stomach, the process

with burping must be impossible or really diminished when in space.

How is the excessive digestive gas expelled from the body?

Because if there's one place you don't want to be farting, it's probably in a space suit.

So not just a load of hot air.

Plus, we'll be finding out how a new car made from cashew nuts, potatoes and marijuana can

outperform a Ferrari.

Racing cars can have a conscience.

You can have an environmentally friendly car that is good to drive and it is nice and fun.

We've got a car here that has a better power to weight

ratio than a Ferrari Enzo. And in kitchen science I'll be showing you a

funky effect with friction. If you want to try it, grab two similar paper-sized

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