Changes to the bacteria that live inside all of us are responsible for increasing the number of people with allergies, suggests new research. The programme investigates this claim by conducting a unique experiment with two allergic families in order to find out just what it is in the modern world that is to blame.
This time, we meet a man who feels no pain, a woman who can smell Parkinson's disease, a man who can remember every face he has ever seen and a survivor of a head injury who woke up to find he could suddenly play the piano. These remarkable cases are shedding new light on one of the most mysterious parts of the human body - our brain.
In the United States, it’s estimated that 30 percent of adults and 66 percent of adolescents are regularly sleep-deprived. This isn’t just a minor inconvenience: staying awake can cause serious bodily harm. Claudia Aguirre shows what happens to your body and brain when you skip sleep.
More than 150 years ago, Edo, the forerunner of Tokyo, had the highest population of any city in the world. But it was ravaged by large-scale fires more frequently than any other major urban center. Yet after each conflagration, Edo rose from the ashes like a phoenix. We'll take a look at how the city managed to overcome such huge disasters and continue to grow.