On the website Twitch, video game fans get to watch popular video game players stream footage of their game play. Now Twitch is going to allow users to make money from their own streaming. We'll dive into reasons for the company's move — which may include a fear of YouTube — and the pitfalls of this business model for gamers. Afterwards, as part of our "hacktivism" series, Science magazine's John Bohannon shares the story behind the site Sci-Hub, which was created by grad student Alexandra Elbakyan after she became frustrated with the paywalls placed in front of research papers. Plus: we ask futurist Garry Golden whether flying cars are in our future.