The darkest thing in the universe Nobody knows what it is, but we can see what it does. Join us for a talk about dark matter. Here’s an article about how we mapped where dark matter is in our universe. Mysterious dark matter mapped in finest detail yet Here’s an article about a galaxy that is almost entirely made of dark matter. A Galaxy has Been Found that's Almost Entirely Dark Matter And here’s an article about a galaxy that apparently has no dark matter. Mystery of Galaxy's Missing Dark Matter Deepens