The North American Plant with Caffeine

Victoria kicks off this week with a charged up salute to caffeine. Sure, you can find it in Coffee and Tea but there are other plants from around the world with caffeine including a Holly from North America.

 

Kirk is up next and he shares multiple examples of times humans have unintentionally caused the evolution of species.

 

Rachel rounds out this week's episode with a Valentine's treat of pearls. Where do they come from? Why do they exist?

 

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