With the demand for new homes ever increasing, we ask what will the buildings of the future be like? Will new materials like bamboo or plastic take a bigger place in our houses? And how can we make our accommodation greener? Plus, in the news, the first model of all of Earth's ecosystems, what a 115 year old can tell us about aging, how to improve cochlear implants, and what happens if you try and stowaway on a plane...