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how much stronger is carbon fibre than steel

Carbon fibre can be stronger than steel but is far lighter. ... read more

poisonous plants

They may look harmless, but some species of flora can be fatal. It takes four castor seeds to kill a human, but 80 to kill a duck. ... read more

animal adaptations

Animals have to adapt to the world in which they live in order to survive. Every species of animal has a different way of surviving. Species develop better ways of dealing with their environment over time. Traits that help an animal survive are passed on to the next generation. Traits that are not nee... read more

how does chlorine clean swimming pools

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

panning for gold

How the 49ers found fortune in the famous Californian gold rush. ... read more