Last month a US court ruled that border agents can search your laptop, or any other electronic device, when you're entering the country. They can take your computer and download its entire contents, or keep it for several days. So how do you protect yourself? By hiding your data.

So your best defence is to clean up your laptop. A customs agent can't read what you don't have. You don't need five years' worth of email and client data. You don't need your old love letters and those photos (you know the…

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Reversing the effects of ageing, reprogramming genes to prevent diseases and producing clean energy are some of the biggest challenges for the next 50 years, according to a group of leading experts.

But capturing that power, converting it into something useful and then storing it posed a challenge. “We only need to capture one part in 10,000 of the sunlight that falls on the Earth to meet 100% of our energy needs,” said Ray…

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