What does it take to deliver a message, precious cargo, or vaccines meant for exactly the right place in our bodies? On this week's show, TED speakers explore the often perilous journey of crucial deliveries.

- Amal is a nine-year-old Syrian refugee. She's also a giant puppet. Theater director Amir Nizar Zuabi discusses how art can deliver a new message on the plight of refugees in his project "The Walk."

 Astrophysicist Erika Hamden spent 10 years building FIREBall, a telescope that reaches the stratosphere and looks for clues to how stars form. Launching it was more challenging than she ever imagined.

mRNA vaccines are groundbreaking—but the mRNA inside them is fragile. Kathryn Whitehead explains how scientists have created the right "packing material" to safely deliver these to the right cells.

 In rural areas, basic health care can be out of reach. Keller Rinaudo founded Zipline, a delivery company that uses drones to deliver necessary medical supplies within hours, even minutes.