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12,072,840 results
This animated video shows the function of different neurotransmitters in our brain in a humorous and entertaining way. Music: Not ...
211,825 views
6 years ago
Atoms are measured in femtometres, that is 1000000000000000th of a meter. For more: https://www.cgtn.com/europe Social ...
4,523,456 views
1 year ago