5 Live Science Podcast

Dr Karl and Dr Rhod discuss the scarcity of helium, the peculiarities of marsupials and the physics of coffee cups.

Why there's so much water underground, a new way to work paralysed body parts by reading brain activity, and a way to heal injured heart tissue by converting scar tissue back into healthy cardiac muscle. They're issues occupying the Naked Scientists this week.

Why aren't humans more hairy? How does a diesel engine work and what exactly is Dr Karl's new planet. That's all on the agenda this week for Dr Karl and Dr Rhod.

On the weekend of the one hundredth anniversary of the sinking of the Titanic, we're taking a look at a NATO technology being delivered by Rolls-Royce to rescue people from an equally tragic situation - a sunken submarine.

Dr Karl answers listeners' questions about the weird and wonderful world of science, including; the similarity between bird and dinosaur eggs. How can we know the universe is seventy billion light years wide. And do humans burn carbon like coal?

Why it would take 42 minutes to fall down a hole through the centre of the Earth.....can we be harmed by fish excrement ......and is it possible that a man's headache goes away whenever he gets close to his wife?

This week we learn how some 2.7 billion year old fossilised raindrops have revealed what Earth's early atmosphere was like, and the reason why your body still wants that cheese sandwich despite the scales saying it shouldn't!

Dr Karl and Dr Rhod discuss aspirin for daily use, why some people don't seem to feel the cold and why do some people like some tastes and not others?

This week on the Naked Scientist - a way to predict heart attacks that are about to happen, a way to block baldness, and we know there's an absolute zero for temperature, but is there an absolute maximum that you can't exceed?

Dr Karl and Dr Rhod try to answer your science questions. This week we ponder why animal eyeballs don't freeze in the Arctic and the relief of the Einsteinian Relativists.

Dr Karl joins Dr Rhod to answer your science questions. Counting calories, making rain and LEDs making more light than they should are just some of the mysteries delved into.

On the latest editon of the Naked Scientist - Antimatter, the rules of physics say there should be at least as much antimatter in the Universe as there is matter, the material that we are made from. But scientists can't find it, suggesting either that we've got something wrong, or something else very exciting and important must be happening. Also, why the hand you type with can affect how you feel. As well as a look at some of this week's other leading science breakthroughs

Dr Karl and Dr Rhod join forces to examine solar flares as one heads towards the earth. Microwaves and electromagnetic pulses are also under the spotlight.

Why the working classes are more gentlemanly than the upper classes, how hippos can select the sex of their offspring, and the discovery of a device which stops people talking.

Is the moon moving away from us and what could that mean...how much salt is too much...and why are water molecules like boomerangs?

Dr Chris Smith and colleagues talk us through the week's science news including the recreation of 30 thousand year old flowers and the importance of what mothers eat before conception.

Why juicing greens might not be the best idea, exactly what sound is and why planets are spherical are all under the microscope as Dr Giles joins Dr Karl.

Dr Chris Smith and colleagues explore one of the biggest computers that's getting bigger and one of the smallest computers that'll be with us soon. Also, what do some fruit flies use alcohol for?

Dr Dotun joins Dr Karl this week. They discuss exactly what causes a migraine, how plants work and give a definitive answer to the question "if a tree falls in a forest and there's no one to hear it, does it make a noise"?

Dr Chris discusses vaccines for cancer thanks to a gene from the gut bug Salmonella, and Sir Steve Redgrave pops in to launch a new science and sport initiative ahead of London 2012.