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Darren Gough from Vancouver, BC asks,

Have you ever hit the top of a glass juice bottle with your fist. It makes a very loud cracking...

Indeed the vacuum inside the juice bottle is the key to the explanation of this...

nick simons from United Kingdom asks,

Why does vitamin C not work as well if it has been heated? I know it is an acid. Does it turn in to...

Vitamin C oxidises easily and at higher temperatures it oxidises faster....

Dean Jones from Saskatoon asks,

Why do we not have a mouthwash that prevents plaque buildup and, hence, gum disease?

I asked Veli-Jukka Uitto, professor and head of oral microbiology at the...

John Crowe from Dublin asks,

If I knew the centre of the universe and began to travel toward it, would I begin to decrease in...

There is no center, the universe is as far as can be seen, the same all...