Messi, Music, and Penguins ... Oh, My!

Today on CNN10: We'll head to Argentina, where fans are weighing in on the storied career of Lionel Messi as the superstar announces he's retiring from international play. Then, we'll see how one innovative creator is using light to create music before getting a look at a surprising technique that researchers are using to help injured wild penguins heal. All this and more on today's CNN10!
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