Las Vegas Sun

August 24, 2016

Currently: 83° — Complete forecast

Stratification is seen in the sides of "Double Negative," which was dug, drilled and dynamited by Bryant Robison and two other men under Heizer's direction.

Sam Morris

Stratification is seen in the sides of "Double Negative," which was dug, drilled and dynamited by Bryant Robison and two other men under Heizer's direction.