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why does mixing alcoholic drinks make you ill

There are lots of theories on why mixing different alcoholic drinks might make you sick. There are different chemicals in different types of alcoholic drinks that infl uence the speed of absorption and the severity of a hangover. These include bubbles, sugar and compounds known as ‘congeners’, and... read more

do fish sleep

Fish do go to sleep, but in a rather different way to humans. ... read more

stars

On a clear night, you can see thousands of stars shining in the sky. From Earth, they seem to be small points of light. Yet many of them are larger than our Sun. There are far more stars in space than you can see with the naked eye. There are so many that you could never count them all. Our Sun is a m... read more

why does looking at the sun damage your eyes

Never look at the Sun unless you are using specially designed glasses that are intended for this purpose. ... read more

how does chlorine clean swimming pools

The chemical reaction that stops swimmers from getting sick. ... read more