05: When Grasshoppers Invaded the American West

07: The Forgotten Wright Who Helped Teach the World to Fly

Katharine Wright was the younger sister of the famous Wright Brothers and, despite not being as well remembered today, was instrumental to her brother's success.

06: Bessie Coleman: The First Black Woman to Earn a Pilot's License

In June 1921 Bessie Coleman became the first African-American woman and first Native American in the world to earn a pilot’s licence - forging her legacy as a pioneering woman of the early days of aviation.

05: When Grasshoppers Invaded the American West

What happened when a swarm of locusts bigger than California invaded the west?

04: Who's on First...?

It's one of the most famous sketches of all time, delivered masterfully by comedy legends Abbot and Costello - but what exactly makes it funny?

03: You had me at scrolling - the iPhone and innovation

In January 2007 Steve Jobs launched the first iPhone and ushered an amazing period of change and innovation.