It seemed like a miracle stone, and eventually, the ancient Greeks, Romans, and Egyptians all started using it, too.

Hosted by: Hank Green
Dooblydoo thanks go to the following Patreon supporters — we couldn’t make SciShow without them! Shout out to Justin Ove, Justin Lentz, David Campos, Chris Peters, and Fatima Iqbal.
Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records:

Or help support us by becoming our patron on Patreon:
Looking for SciShow elsewhere on the internet?




  1. the pros out weigh the cons i my opinion. unless you actually work with the stuff, it more than likely wont effect you. if you work with it, wear breathing equipment. cheap, durable, flexible and naturally acted as an insulating and fireproofing agent. use it in homes for fireproof insulation again. if its blocked off with drywall, it shouldn't harm anyone, and might give the fire department a little more time to get to your house before it's a complete loss. seriously, everything gives you cancer, or kills you in some way. nothing is 100% beneficial. everything has a downside or side effect.

  2. Here's just an interesting piece of information relating to asbestos. The rock tigers eye is actually asbestos that has had iron naturally put into it over time. That's what gives tigers eye it's strange light properties.

  3. I run pipe in old packing houses around the US. We work a lot with old insulation and there is a lot of asbestos out there still. We are the only ones that mess with it so it goes un noticed and non hazardous.

  4. All the schools in my area has asbestos in their structure, I know this because it has a warning sticker on every entrance to the building at my school. And I've never worried about it. – an Australian.

  5. My elementary school in the 1970s had asbestos in the walls and ceilings, the city decided the safest thing to do was leave it all encased and not try to rip it out. Then when I was in 6th grade our town flooded and they ended up gutting the entire school to renovate it. It's since been torn down.

  6. The government made a scare tactic out of asbestos and made things a mess with it. Same thing with lead paint. Get rid of the EPA. Common sense used to be everywhere but I think it's now dead

  7. 4:03 Interesting. Does the math work out for that? I've seen my fare share of fiber count reads on asbestos jobs and even when I adjust the math for the ambient fiber counts out side of the areas that have asbestos being disturbed the numbers don't equal a million fibers per year And those fiber counts are for all fibers they aren't acid reduction counted. If i'm wrong lease correct me. I'm just trying to figure out his statement there.


Please enter your comment!
Please enter your name here