I think the best invention was langauge – it means we can tell people about all things we have learned and so we don’t have to start from scratch and re-invent the wheel every generation.
In the current age of I think Wikipedia is the best invention because it means that anyone can learn about whatever they like absolutely free! When poorer countries start becoming better connected to the internet I think it will help children there more than almost anything else around at the moment.
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