Why do teenagers sometimes make outrageous, risky choices? Do they suddenly become reckless, or are they just going through a natural phase? To find out, Kashfia Rahman -- winner of the Intel International Science and Engineering Fair (and a Harvard freshman) -- designed and conducted an experiment to test how high school students respond to and get used to risk, and how it changes their still-developing brains. What she discovered about risk and decision-making could change how we think about why teens do what they do.

In 132 CE, Zhang Heng presented his latest invention: a large vase he claimed could tell them whenever an earthquake occurred for hundreds of miles. Today, we no longer rely on pots as warning systems, but earthquakes still offer challenges to those trying to track them. Why are earthquakes so hard to anticipate, and how could we get better at predicting them? Jean-Baptiste P. Koehl investigates. [Directed by Cabong Studios, narrated by Addison Anderson, music by Matheus Wittmann].

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This talk will cover everything you need to know in order to create a plugin to start using on your own site. You won’t need to have any prior PHP or other coding knowledge to walk away with something you can use right away.

Robot brains are getting smarter and smarter, but their bodies are often still clunky and unwieldy. Mechanical engineer Christoph Keplinger is designing a new generation of soft, agile robot inspired by a masterpiece of evolution: biological muscle. See these "artificial muscles" expand and contract like the real thing and reach superhuman speeds -- and learn how they could power prosthetics that are stronger and more efficient than human limbs.

Keith Kirkland is developing wearable tech that communicates information using only the sense of touch. He's trying to figure out: What gestures and vibration patterns could intuitively communicate ideas like "stop" or "go"? Check out his team's first product, a navigation device for the blind and visually impaired, and learn more about the entirely new "haptic language" he's creating to power it.

In a world deeply divided, how do we have hard conversations with nuance, curiosity, respect? Veteran reporter Eve Pearlman introduces "dialogue journalism": a project where journalists go to the heart of social and political divides to support discussions between people who disagree. See what happened when a group that would have never otherwise met -- 25 liberals from California and 25 conservatives from Alabama -- gathered to talk about contentious issues. "Real connection across difference: this is a salve that our democracy sorely needs," Pearlman says.

In this talk, we will look at what WordPress looks like as an Application Data Graph and how WPGraphQL enables a GraphQL API for WordPress and allows us to interact with the WordPress graph via GraphQL queries and mutations. In previous talks, (WordCamp US 2017, WordCamp for Publishers 2017, WordCamp Orange County 2017) I’ve talked a lot about the history of WordPress APIs and how GraphQL compares to them and helps solve some problems of using other APIs. This talk will focus less on the history of why WPGraphQL came to be and how it compares with other existing WP APIs, and focus more on how to use WPGraphQL, how to extend WPGraphQL to work for your site. We’ll start by looking at basic usage of WPGraphQL: querying posts, pages, terms, etc. Then we’ll explore some features of the query language such as variables, aliases, and field arguments. Then we’ll look at Mutations (creating, updating and deleting data) and we’ll discuss how WPGraphQL handles Authentication and Authorization, and other features like fragments. Throughout the talk we’ll look at the internals of WPGraphQL and how it goes from a request to the WordPress server to resolving data back to the client, and how it makes use of core WordPress technology to efficiently resolve data.

Kakenya Ntaiya turned her dream of getting an education into a movement to empower vulnerable girls and bring an end to harmful traditional practices in Kenya. Meet two students at the Kakenya Center for Excellence, a school where girls can live and study safely -- and uplift their community along the way. "When you empower a girl, you transform a community," Ntaiya says.

At 16, Rana Abdelhamid started teaching self-defense to women and girls in her neighborhood. Almost 10 years later, these community classes have grown into Malikah: a global grassroots network creating safety, power and solidarity for all women. How did she do it? Abdelhamid shares three ingredients for building a movement from the ground up.