Seeking shelter in caves was one of the earliest human behaviors.
We can only imagine what our distant forebears felt as they found safety there, warming and feeding themselves with fire, perhaps painting animals on the walls. Caves protected our ancient ancestors from the weather and enemies and beasts.Studying lava caves in China
The vertical ones have large openings on the surface, called skylights, that lead to deep pits filled with debris and soil. These require special equipment or vehicles to access them. The sloping ones have partially collapsed walls that allow direct tunnel entry. These are easier to explore with lunar probes.
The central probe will be a robot with feet or wheels that can navigate complex terrain and avoid obstacles. It will carry scientific instruments to measure the environment, topography, and composition of the lava tube entrance and interior. It will also deploy auxiliary detectors that can communicate and provide energy to each other.
In addition, a flying detector can fly autonomously in dark and rough caves using microwave and laser radar.
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