Ask the Naked Scientists Podcast

Can a new stomach be grown in a dish? Are Ebola survivors immune from future infection? Why do injuries seem to hurt more later? Are there homosexual dolphins? How do muscles make energy? How do ants home in on food? Can dogs judge human character?

Why do people talk to themselves? Can cats cut your risk of a heart attack? Does salt help water boil quicker? Do women have an Adam's Apple? Plus, an update on Ebola and a rapid paper-based test for the virus...

Why do I sneeze in bright light? Can the radio control my dreams?

Why did dinosaurs grow so large? Do flies have blood? Can chemotherapy get into the brain? Why do scorpions glow in UV light? Did we interbreed with Neanderthals? Plus, news of how your sense of smell can indicate how long you have left to live...

How is sea-level defined? What makes some people sleepwalk? How are barometers calibrated? What is an acquired taste? How much of the body is water? Do we really use only 10% of our brain? Why does red wine stain your lips? Why to I talk in my sleep? What happens if you drink petrol?

How do people catch ebola? Why do brothers and sisters look different if they have the same parents? Can we mine the moon for fuel? Why should you not re-freeze meat? What causes birth marks? What is a curve of pursuit? Can you be born circumcised? Dr Chris answers more of your questions, on Talk Radio 702...

Can we rear people in a germ-free environment? Can you be born with only one kidney? Why does spaghetti always break into 3 pieces? What exactly is temperature? When you add more water to the bath and then pull the plug - what water goes down the drain first, the new or the old? Why do birds live longer than their size would suggest?

Why does running water make you need the loo?

Can you get sunburnt through a glass window? What are white holes? If everything is made from atoms, and atoms are largely empty space why can't we phase through walls? Can chlorophyll help body odour? What causes ringing in your ears? Can you train a child to be ambidextrous? Plus, an update on Ebola.

If you fall asleep with the radio playing what effect would this have on the brain? How do marine mammals stay hydrated? If you fall off a certain height do you die before you hit the ground? How come children spit all the time? How accurate are dinosaur reconstructions?

What's causing the ebola outbreak in northwest Africa? Is our sun unique? Why did we make clocks tick the way they do? Does altitude affect my blood pressure? Would the passengers remain conscious aboard an aircraft hit by a missile? Where does the iron on Earth come from? Are maps accurate?

Should my air-conditioning be fresh or recycled air? Is the International Space Station in geostationary orbit? What causes plane vapour trails? Is it alright to drink water on an empty stomach? Why do we have blood groups? Why do we boil our food? Why do some wines give you a worse headache? Plus, why beef is off the menu for a sustainable world...

Are there extra types of water? Do plants give off carbon dioxide at night? Why does huddling together keep you warm? What is the origin of belly-button fluff? What causes nightmares? And how does the magnetic field around Earth affect us? Plus, news of how dental plaque can show us what our ancestors ate...

How does a gastric bypass work? How do spaceships land safely back on earth? What makes humans so successful? Are new species still appearing? Is the sea getting saltier? Plus, news of biomarkers for Alzheimer's Disease...

How do e-cigarettes work? Could a blind chameleon still change colour? Do sightless people pick up on things most of us miss? Can the hydrogen be extracted from water? How are hurricanes named? How do birds navigate? How do vaccinations against bacteria and viruses work? Join Dr Chris for the answers to South Africa's top science questions, as well as news of a solar power breakthrough based on a tofu ingredient...