In the 21st century the pen is truly mightier than the sword. Knowledge can unlock so many possibilities in today’s world that it pays to invest in products that can boost your brain power. These 7 gadgets won’t get you automatic membership to Mensa, but they’ll certainly make realising your potential a little easier. Bose QuietComfort 20i If you’re working on something that requires all your attention, the faintest of noises can prove to be a distraction. Whether it is office chitchat or the hushed whispers of other students in the library, there are times when you’ll just want a bit of silence.…