Bone Cities, Ash Towers, and 4 Other Futuristic Buildings

Go to to start streaming Digits. Use the promo code ‘scishow’ during the sign-up process to get your first 31 days free. Right now, the construction industry heavily relies on concrete, but it isn’t great for the earth. Many scientists are looking for ways to replace it in the future, and some of their ideas are so off the wall that they just might work. Hosted by: Hank Green SciShow has a spinoff podcast! It’s called SciShow Tangents. Check it out at