Tar -

: Native Americans, such as the Chumash, used natural tar seeps to waterproof boats (tomols), seal water bottles, and even weigh down grass skirts.

Tar is a viscous, dark liquid primarily obtained through the (destructive distillation) of organic materials such as coal, wood, or peat. : Native Americans, such as the Chumash, used

: Today, tar is vital for road paving, roofing, and as a binding agent in construction. It also has niche uses in art, such as providing templates for pottery. 2. Medicine and Science : Native Americans