We didn't realise until today that it was Robert Bunsen's birthday.
It was Google's logo, specially adapted for the occasion, that alerted us.
So I rushed off the the university and filmed a quick video with The Professor.
Bunsen of course is best known for his famous burner. But he also discovered two of our favourite elements - caesium and rubidium.
We also posted this video of extra footage to Test Tube.
And here's an old video I'd posted with a Bunsen Burner lighting in slow motion, which was made when I was testing a new camera!