Test Your Brain sizes up the human brain with an intricate series of interactive experiments to see how easily the brain can be fooled. Our brains are hardwired to make sense of what we see, hear, smell, touch and taste, and fill in missing pieces with whatever our expectations suggest should be there. This helps us understand sentences even when the letters are out of place. But while brains are amazing at processing the world around us, how much should you actually trust your own brain? Enough to multitask by chatting on your cellphone while taking a drive? Think spotting a dancing, life-size penguin sounds easy? Or how about riding a bike with your eyes closed, or picking the right person out of a line-up after witnessing a crime?