What are manmade materials that last a long time?

Manmade materials that exhibit longevity include concrete, which is known for its durability and strength, making it ideal for infrastructure. Other examples are glass and metals like stainless steel and titanium, which resist corrosion and wear over time. Additionally, certain synthetic polymers, such as polyethylene and polypropylene, can withstand environmental degradation, contributing to their extended lifespan in various applications. These materials are often favored in construction, manufacturing, and packaging for their resilience.