Tao produced the One.
The One produced the two.
The two produced the three.
And the three produced the ten thousand things.
- Lao Tzu, Tao Te Ching: about 2500 years ago 
10000 years in the future. What language do you speak? How do you shape symbols, markers? Gaze back to the Present. How do you witness terrain? What animals and plants do you see? How does the sky appear?
10000 years ago, early Archaic. You are walking, what do you see? How do you signal. Gesture? Gaze forward to this Present. How would you make a Universal Warning Sign?
10000 years give or take, a blip in geologic time. Yet, an elusive temporal imagining for an embodied human. What image/symbol/figuration endures, holds meaning? How to chart it, graph it, digitize it, mark it, so… we get it? As we inquire, we wonder - does it matter? The Ten Thousand Things. The eternal proliferation. Back to square One of The Tao.
Nuclear waste doesn't go away. These are not simple questions with easy answers. Indeed they may be deadly important. When Yucca Mountain, Nevada, was in serious consideration as a permanent disposal and containment site for “high level radioactive waste” (1987-2011) , how to warn future (human?) beings of danger spurred a design competition. A Universal Warning Sign was essential one that would be understood 10,000 years into the future. 
The graphic image above is one part of the submission by Yulia Hanansen.
The first image below is a submission by Southwest Missouri State University's Brandon Alms.
With the 2nd image below, not part of the competition, I offer as a counterpoint: a compelling art poster (1995) by Jaune Quick-To-See Smith. She says, "I chose rabbits as an art icon because there is a cultural universality to them throughout the world."
The 3rd image: a competition graphic by Yulia Hanansen.
The final image: Archaic Petroglyph, Southeast Oregon, photo Douglas Beauchamp.
 Lao Tzu, The Way of Lao Tzu, Wing-Tsit Chan, trans.
 Yucca Mountain Nuclear Waste Repository.
 Universal Warning Sign competition (2002) for Yucca Mountain. Universal Warning Sign: Yucca Mountain. Stone: An Ecology of the Inhuman (2015), by Jeffrey Jerome Cohen, provides a concise overview about the 2002 Universal Warning Sign competition for Yucca Mountain.