He was a dynamic entertainer and a prolific business man, but P.T. Barnum was also responsible for shaping how we view celebrity and fake news. We look at how Barnum’s impact lives on.

Then, we have a lot of faith that self-driving cars - and a bunch of other technologies - will be a part of our life very soon. But, according to roboticist Rodney Brooks, we should take that enthusiasm down a notch.

Finally, Americans pay more for solar panels than people in other countries. Andrew Birch, former CEO of the solar installer Sungevity, says permits and regulations are to blame.