0_Apprentice
I have done a bit of yoga but don't know a lot about it.
1_Wizard
Me too, a group of physical, mental, and spiritual practices or disciplines 
0_Apprentice
Do you know where it originated?
1_Wizard
Sure! origins of yoga have been speculated to date back to pre-Vedic Indian traditions
0_Apprentice
That sound very old, what periods was that?
1_Wizard
 sixth and fifth centuries BCE, in ancient India's ascetic and śramaṇa movements
0_Apprentice
Wow thats very old. Are there many different forms of yoga?