Why does Soda have bubbles?

What were the first Soda Pops? How do they get the bubbles into Soda? Were early Sodas actually used as... medicine? Thank you for being a Who Smarted + Subscriber! Get official Who Smarted? Merch: tee-shirts, mugs, hoodies and more, at Who Smarted? For more information about our other projects, including bespoke branded podcasts and series for your company, check out  Atomic Entertainment.