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Medicine and technology can enhance the way our minds function, but at what cost?

A race of humans who can work without tiring and recall every conversation they've ever had may sound like science fiction, but experts say the research field of human enhancement is moving so fast that such concepts are a tangible reality that we must prepare for.

People already have access to potent drugs, originally made for dementia patients and hyperactive children, that boost mental performance and wakefulness.

Within 15 years, experts predict that we will have small devices capable of recording our entire life experience as a continuous video feed - a life log that we can reference when our own memory fails.

Advances in bionics and engineering will mean we could all boast enhanced night vision allowing us to see clearly in the dark.

While it may be easy to count the potential gains, experts are warning that these advances will come at a significant cost - and one which is not just financial.

Potential harm

Four professional bodies - the Academy of Medical Sciences, the British Academy, the Royal Academy of Engineering and the Royal Society - say...