Who decides how long a second is? - John Kitching
TED-Ed
Next Episodes
We can help you master public speaking - Chris Anderson @ TED-Ed
๐ 2021-01-14 17:00
Savitri and Satyavan: The legend of the princess who outwitted Death - Iseult Gillespie @ TED-Ed
๐ 2021-01-12 17:00
These squids can fly... no, really - Robert Siddall @ TED-Ed
๐ 2021-01-11 17:00
A day in the life of an ancient Babylonian business mogul - Soraya Field Fiorio @ TED-Ed
๐ 2021-01-07 17:00
Why should you read Toni Morrisonโs โBelovedโ? - Yen Pham @ TED-Ed
๐ 2021-01-05 17:00