নাসা কেন এসব মেশিন বানিয়ে এখনো লুকিয়ে রেখেছে? কি কাজে লাগে এগুলো?

Explore the incredible world of the largest land vehicles ever created! These engineering marvels are built to tackle some of the toughest jobs on Earth, from massive excavation to hauling tons of material across challenging terrains. With mind-boggling sizes, immense power, and specialized designs, these vehicles play a vital role in industries like mining, construction, and earth-moving. Join us as we dive into the scale and functionality of these giants that are truly bigger than life!