Do Bacteria Grow on Bars of Soap?
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In this Naked Scientists Question and Answer show, we find out if bacteria will grow on a bar of soap, why bird poo is white and whether or not a moon can have its own moon. Also, do sweeteners alter your metabolism and can we re-stock the oceans with farmed fish? Plus, we explore the oily threat to Bluefin Tuna, a newly discovered way that blood vessels in the brain clear a blockage, how channels on Mars reveal secrets about the Martian climate, and why shape is essential for H. plyori - a gut bug associated with ulcers and cancer. In Kitchen Science, Ben and Dave recreate a classic experiment to show that flames are hollow!
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New research pinpoints the favourite breeding spots of west Atlantic bluefin tuna in the Gulf of Mexico spelling both good and bad news for these imperilled fish: conservation efforts now know where to target efforts but the bluefins’ spawning grounds overlap with the recent Dee...
Cells lining blood vessels in the brain can grab clots and other obstructions and dump them outside the vessel to restore blood flow, US researchers have found...
Astronomers studying enigmatic grooves on the surface of Mars have uncovered secrets about the planet's historic climate.
A new fossil study reveals that the ancient ancestors of octopuses, squid, and cuttlefish have been swimming through the oceans for at least 30 million years longer than previously thought...
Researchers in Seattle have found that the spiral shape of the bacterium Helicobacter pylori is key to its ability to infect the stomach lining. Dr Nina Salama from the group, that published in the journal Cell, explains that the key genes that determine the shape could be targe...
Why does Steven Hawking claim there’s almost certainly life in space? Should we be scared of aliens?
Look inside a candle using nothing more sophisticated than a sieve, and find out how the same principle saved thousands of lives.
Would bacteria grow on a bar of soap? So would it be better to wash my hands using the dirty soap bar, or not wash them at all?
When are there too few animals to save a species? Pandas and other endangered animals for example. What is the cut-off when there won't be enough genetic diversity left in the numbers that are left in the wild for them to be saved?
Would it be possible to make a hollow metallic sphere float if you suck out all of the air and create a vacuum inside?
Hi Naked Scientists,
I was seating with a cup of coffee on a chair in my back yard in the morning, watching a seagull flying above me, wondering if I'd have the time to avoid it's poo, if the seagull felt such a need right above me. And then I remembered my car, and the fact...
Meera explores the RHS Chelsea Flower show to discover how the help our rainforests and entice wildlife into her garden...
Is there any connection between high tides and earthquakes?
When driving around at this time of year and looking ahead, you see what looks like a reflection of water on the road. I know this is a mirage, but what is it – what are we actually seeing and what are the conditions that are making it happen?
Hi Chris and all of you Naked Scientists!
This is Carol from California here. My entire family listens regularly to your show and we just love it.
I have a question for the astrophysists:
When they discover an exosolar planet by the wobble it emparts on its star, how do...
I have an aquarium in my home and I was wondering, why the UV steriliser I have in it can get rid of algae, but UV in sunlight or from UV bulbs placed above the tank will actually paradoxically promote the growth of algae.
Why is it that most parts of your body can repair themselves after damage, but your heart does not seem to be able to?
Alan in Durham City UK
Hi everybody, congratulations again on a great show, you're awesome.
I have a question regarding metabolism.
I subscribe to a running magazine in which I found an article which stated that athletes should always avoid aspartame and sucralose (ingredients in zero calories s...
Can a moon have a moon? Do any of the moons in our solar system have moons? Is it theoretically possible for this to happen, or would the gravity of the planet being orbited make the arrangement too unstable?
Thanks for the great podcast.
We have been encouraged to eat more fish, yet many wild fish stocks are endangered or decreasing, and fish farming can be detrimental to the environment. Would we lessen these problems if we were to "stock" the oceans by breeding large numbers of fish in captivity and then relea...
Why does eating sugar puffs make your wee smell funny?
Blowing out a candle
As I was playing with candles this week and had a high speed camera I thought it would be interesting to watch one being blown out in slow motion...
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