1. Brain Pump
Brain Pump came in first on Sunday, with 179 upvotes as of Tuesday. The website provides users with a randomly selected educational video. (We saw a video on the science of procrastination, one exploring whether you can cry in space, another visualizing the scale of the universe, and one on the correct way to eat a pomegranate.) After one video ends, another automatically begins. Users can also choose a topic to learn about — like “casual science,” “how it’s made,” “history,” “DIY,” or “the future,” and can subscribe via email to receive the top five videos every week. Additionally, anyone can create a topic, or contribute a link to a YouTube video to be added to a new or existing topic.