Why do Men's Bits Shrink in the Cold?
How heavy is the Earth? How do snakes digest huge meals? Should I fear falling bullets? We take on these questions and more in this Naked Scientists Question and Answer show! We'll discuss the ideal hair for head lice, the mechanics of using a straw and why men's bits shrink in the cold! In the news we explore the link between jetlag and forgetfulness, discover a moon with an oxygen atmosphere, and a new technique to tell someones age by their blood. Plus, in Kitchen Science we find out why a full carton is much harder to shake.
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Psychologists working at the University of Berkeley have found that jet lag affects the brainís ability to retain facts long after returning to a more regular schedule...
In a move that could make a critical contribution to forensic investigations, scientists have developed a powerful new technique to predict a person's age from a sample of their blood.
A Bose-Einstein condensate of photons has been produced that works at room temperature.
Wednesday, December the 1st is going to be World Aids Day and 2011 actually marks the 30th anniversary of the discovery of HIV Ė the agent that causes AIDS. So itís very timely that this week scientists have announced that they have solved one of the big outstanding questions t...
Researchers in Massachusetts this week have discovered that the ability of our brains to determine whether a human face is male or female is affected by where in the field of view they appear...
One of the most unusual things about the earth is the large amount of oxygen in its atmosphere, which isn't stable and is only there because plants keep producing it. NASA has found another world with a mostly oxygen atmosphere, but it isn't what it sounds like.
I love your program.
Some large snakes are able to swallow large animals. Is it true they could go months if not a year between meals?
Also if this is true why does the food not spoil and get the snake sick?
What happens to the bones of the food.
How is bone marrow turned to blood and how is the marrow replaced once itís used up?
One thing I have wondered is how much does earth weigh? How many pounds does earth way, and if we don't yet know, do you think it would ever be possible to guess accurately?
KEEP UP THE GREAT WORK!!!
Do head lice like dirty or clean hair more?
I am not sure quite how to phrase this... but in this very cold weather why do the male private parts shrink so much?
In July this year, five devastated a Surrey beauty spot. Fire fighters from three counties tackled the blaze on Frensham Common but 86 acres of heathland were reduced to a scene of blackened devastation. It may take up to five years for the affected land to recover, but not ev...
When you sip a beverage through a straw, what exactly is going on inside your mouth to create the suction strong enough to bring up the liquid?
I know it doesnt have anything to do with breathing, because i could breathe just fine when i used the straw (ha ha no i didn't inhale ...
I noticed that all the sea shells with Spiral growth patterns (I have not yet seen otherwise) all grow in the same direction. What would the reason for this be?
What forms or creates sea shells to "grow"?
Hi Chris -
I'm a big fan in the States listening to the podcast.† My 10 year old son has a question about soap bubbles.† His question is simple, and I suspect difficult to answer.†
Exactly why does dishwashing soap make bubbles?
I understand about the soap sort of denat...
How does giant hogweed change skin and damage it?
Hi Chris and Team,
Love the show.
I have a physics question. I don't think it's been covered much or at all, even though it's of course, incredibly important! I can't find much info online, mostly because it's difficult to phrase the question in a search engine. Here goes.....
Lying on the floor, revolver in one hand, rifle in the other, if you fire straight up in the air, will the bullets be harmful when they hit the ground?
I look forward to the podcast each week.† It took me quite a while to catch up to the present shows as I've listened to all of them to date.† I hope the show runs as long as you folks want it to.
My question actually comes from a cartoon panel in a 1940 New Yorker magazine:
I have a question about prehistoric humans. The stereotype is that prehistoric man went out and hunted and prehistoric woman stayed in the cave and looked after the kids. Is there actually any archaeological evidence for this?
If temperature is a measure of the average speed of molecules in a material, what is the temperature of a perfect vacuum?
How much further can you see beyond the horizon as you go up each floor of a skyscraper building?
Hi Dr. Smith
Would you be so kind to clarify this relating to GPS speed monitor on next week's show with Redi?
My thoughts are as follows, but they are ever so slightly incoherent.
In South Africa a good signal will allow a WAAS enabled GPS to be around 3m accurate on a...
The universe is expanding at an ever-increasing rate. a) How fast is that now? b) Presumably the limit will be the speed of light - what will happen then? Will the rate of acceleration slow down as we approach the speed of light or just suddenly stop? Will the universe begin to c...