Dark Matter & Dark Energy: The Hidden Cosmos - Timothy Ferris

The universe is governed by many rules that humans have been able to figure out through centuries of careful observation of how celestial bodies interact. But there are potentially more rules of the universe that we're still in the dark on. Two such forces that we've been able to theorize but never observe are dark matter and dark energy. Timothy Ferris, author of the January 2015 National Geographic magazine article "A First Glimpse of the Hidden Cosmos," explains that the galaxy we call home contains five times more dark matter than it does visible matter. But Ferris says that this field of science studying rules of the universe that we have such large knowledge gaps of, "it's impossible to say as of yet what the future of this field will be like... nobody will know until there's a whole lot more research and experimentation."