If Yoda goes into cardiac arrest, will you know what to do? Artist and first-aid enthusiast Todd Scott breaks down what you need to know about using an automated external defibrillator, or AED -- in this galaxy and ones that are far, far away. Prepare to save the life of a Jedi, Chewbacca (he'll need a quick shave first) or someone else in need with some helpful pointers.

We increasingly make decisions based on short-term goals and gains -- an approach that makes the future more uncertain and less safe. How can we learn to think about and plan for a better future in the long term ... like, grandchildren-scale long term? Ari Wallach shares three tactics for thinking beyond the immediate.

Why does race matter so profoundly for health? David R. Williams developed a scale to measure the impact of discrimination on well-being, going beyond traditional measures like income and education to reveal how factors like implicit bias, residential segregation and negative stereotypes create and sustain inequality. In this eye-opening talk, Williams presents evidence for how racism is producing a rigged system -- and offers hopeful examples of programs across the country that are working to dismantle discrimination.

At the heart of the Milky Way, there's a supermassive black hole that feeds off a spinning disk of hot gas, sucking up anything that ventures too close -- even light. We can't see it, but its event horizon casts a shadow, and an image of that shadow could help answer some important questions about the universe. Scientists used to think that making such an image would require a telescope the size of Earth -- until Katie Bouman and a team of astronomers came up with a clever alternative. Learn more about how we can see in the ultimate dark.