Dear Friends, 
With regard to Panini, Euclid and Galileo Galilei, I thought it would be appropriate to be concise rather than prolix. 
In order to achieve this conciseness, I have, perhaps not surprisingly, taken recourse to Sanskrit. 

So for anyone having a few minutes to spare, here are some thoughts on Panini and Euclid: 

https://www.youtube.com/watch?v=TKarqgisrOI

and on Galileo Galilei: 

https://www.youtube.com/watch?v=dPV1G8Q0mY0

With best wishes for Christmas and New Year.
Jan Houben

--
Prof. Dr. Jan E.M. Houben,
Directeur d Etudes « Sources et Histoire de la Tradition Sanskrite »
Ecole Pratique des Hautes Etudes, SHP,
A la Sorbonne,45-47, rue des Ecoles,
75005 Paris -- France.
JEMHouben@gmail.com
www.jyotistoma.nl