Not all was harmony. A faction called the Extractionists on Earth argued Mars' mineral wealth could solve resource scarcity. Their lobby funded stealth probes to claim deep deposits. When one such probe drilled near a relic, the valley shuddered. The structures trembled, not in anger but sorrow. A ribbon of light unwound from the nearest spire and wrapped around the probe in a cascade of tones. The drill stopped. The probe's operators found their instruments rewritten—code that made them oversensitive to the valley's microhabitat data. Exposure to the valley became a liability for exploitation.
A comprehensive teaching guide for the Our Universe series, which includes specific discussion questions and classroom activities for the Mars book, is hosted by Marianne Dyson . mars earthlings welcome pdf
