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Wrought iron, on the other hand, has more of a fibrous internal structure with grains running through it almost more like wood as a consequence of the extensive heating, hammering, and layering process that it undergoes. (And the higher the quality of the wrought iron, the more extensive this process will be.) That means that the final product is extremely strong and less likely to break under force rather than bend. This makes cast iron the better choice for holding up against constant pressure.

In today's world, energy efficiency is a crucial consideration for both homeowners and builders. Aluminum window frame extrusions can be designed with thermal breaks—insulating materials that reduce heat transfer. This feature significantly enhances a building's energy performance by minimizing heat loss in winter and heat gain in summer. By using energy-efficient aluminum frames, homeowners can lower their heating and cooling costs, thus leading to a more sustainable and economical living environment.

Moreover, real spears have found their place in contemporary societies, often celebrated in sports, arts, and reenactments. Javelin throwing, for example, is an Olympic sport that pays homage to the spear in its athletic form. Meanwhile, historical reenactors and martial artists study traditional spear techniques, preserving the knowledge and skills of ancestors for future generations. This blend of history and modernity illustrates the enduring legacy of the spear across time.