Best-selling author Steven Johnson relates the story of people who take us out of the dark and into the light, including the invention of Edison’s light bulb and how an 18th-century shipping community discovered a source of illumination by putting a kid inside a whale’s head, How We Got to Now.
Learn about bats, one of the most populous mammals on the planet. It’s Okay To Be Smart visits Bracken Cave in Comal County, Texas,where 20 million Mexican free-tailed bats gather in annual maternity colonies.
How was the first long-lasting light bulb invented? Steven Johnson explains the life span of this innovation, from its conception as a seed of an idea to its birth as a fully-fledged working invention on How We Got to Now: Light.