Today is Ada Lovelace Day - a celebration of women in science.
We've marked it with a film on Deep Sky Videos from astronomer Dr Meghan Gray.
Meghan spoke about Beatrice Tinsley, a pioneer in her chosen field of galaxy evolution.
I've had a quick scan through the archives on other projects and found a few more videos which seem appropriate to share today.
Dr Gray on the now notorious "Girl Thing" video...
Engineer and balloonist Dr Janet Folkes was tragically taken from us this year.
Janet breaks a world record.
A day in the life of an astrophysicist.
Not many people have an element named after them!
Rosalind Franklin - another great scientist who died too soon.