Answers to Science Questions

I've always been thin and can eat and drink what I like. Why is this? Linda in Norwich - Why is it that people...

If someone works out a lot and is in great physical shape but eats foods which are very high in fat or cholesterol, in...

When will there be radar controlled brakes on cars?

What is COPD?

When you sneeze, why do you sometimes get a horrible smell?

Was the Star of Bethlehem a real astronomical event?

Why can't you tickle yourself?

When you put wood on a fire, why does some wood spit and crackle while other wood burns slowly and quietly?

How and why does your skin get thin when you get older? Does it really get thin or is there something else going on?

Why would our eyes have developed to take in more information than our brains can process? Secondly, if we only use...

If your voice goes croaky, does anything happen to your voice box to make it go all croaky?

We have a picture of my wife's father in the police force in 1947. He's wearing a hat and holding a truncheon...

How can someone extract and sequence DNA from something that's been buried for centuries?

When you have DNA left on a piece of clothing, how do modern techniques match the DNA with the guilty suspect?

Are solar panels on spacecraft mistaken for UFOs sometimes? - Matthew has emailed us with an addition to an answer last...

I've heard that there's a single origin for the emergence of Homo sapiens. Is there any scientific background...

What is the possibility of erroneous matching of DNA? There was a case I saw about 8 years ago in which a man was...

I've heard that bone marrow transplants can cause havoc with DNA testing. Is this the case, and if so, how can the...

Is there any such thing that could erase or change DNA?

Why is it that we like drinks with gas, like beer or coke? If we drink these beverages without it, they taste bad, but...

What's gravity made of?

Is it true that someone's head would explode if you went out into space without a helmet on?

Is it possible to see a gamma ray burst in the sky? I saw something in the sky flash on and off one night.

We're told that photons can't escape from a black hole, and I was wondering if gravitons can escape from a...