Ladder
A ladder is a portable structure with parallel sides and rungs or steps, designed for climbing to reach elevated areas. It also metaphorically represents a series of steps toward advancement, like in career paths or molecular biology where DNA forms a ladder-like double helix, highlighting its role in both everyday utility and abstract concepts.
Did you know?
The oldest known ladder, found in the Spider Cave in Arizona, is over 12,000 years old and made from aspen wood, proving that early humans ingeniously used such tools for accessing difficult areas long before modern engineering. This artifact underscores how ladders have been pivotal in human history, enabling everything from cave exploration to ancient construction projects.
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