Yes they can, so if you’ve been having an affair or doing something dodgy at work, beware! Messages are laid out on the SIM card as data files. When you move messages around or delete them, the data actually stays put. All you’re doing is telling the phone to point at the files in different ways. Deleting a message from the inbox, for instance, just tells the phone not to point to it any more when it’s listing the contents of that folder. Even when you ‘permanently’ clear messages, you’re simply getting the phone to stop listing it in the deleted items folder. You can’t recover such texts on the phone itself, but there are plenty of commercially available software packages you can buy that allow your PC to read data directly from a SIM card. Some of the more advanced tools figure out the file structure on the card, thus allowing those long-hidden deleted messages to be resurrected.
To create a sound, we have to set matter - whether it's a gas like air, a liquid or even a solid material - in regular motion, creating a wave of specific frequencies, which we hear as a sound of...
Mirrors don’t reverse left and right either – that’s just our interpretation of what happens. Your reflection in the mirror is actually reversed front to back – if you have...
Discovered by an American student named Gary Flandro in the mid-1960s, the slingshot manoeuvre usually involves spacecraft briefly 'coat-tailing' a planet orbiting the Sun, extracting some of the...
The ice disappears because the wind blows away water molecules that have evaporated or 'sublimed' from the ice, so the ice slowly shrinks in size. The molecules that escape are those with the...
Here's a sneak preview of some of the exciting tech and accessories which will be exhibiting in April 2015
A round-up of some of the postgraduate and short courses available in science subjects
Fuel your stargazing passions with these courses and accessories
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“Why doesn't a Cadbury Flake melt in the microwave?” and “What happens to old aeroplanes?” BBC Click Radio presenter Gareth Mitchell answers life’s big questions
The BBC Focus team taste the world's smelliest foods: surströmming, century eggs and durian.