Meet two engineers: Jyoti Sehdev is a civil engineer, and Ailsa Roberts is a structural engineer

Meet Isambard Kingdom Brunel

Hear about his adventures tunnelling under the Thames, building the Great Western Railway and his famous bridges/ships.

Meet two space scientists: Suzie Imber and Jane Strachan

Meet Gene Cernan (1934 - 2017)

Gene Cernan was an astronaut and the last man to ever walk on the moon. 'Meet' Gene and find out more in the video below.

Meet a viral immunologist and a hospital doctor

We would like to say another big thank you to everyone who sent in questions and pictures, and to Phoebe and Zania for taking time to film themselves at home and answer them.

Meet a Florence Nightingale

Florence talks about her life and work and answers lots of your questions – you might spot your picture in there too!