Excuse me, could you please explain in simple terms how one goes about obtaining a double helix structure? I'm interested in understanding the fundamental processes that lead to its formation, especially in the context of biological molecules like DNA. Is it a natural occurrence that arises from specific chemical interactions, or is there a more complex process at play? Additionally, I'm curious if there are any man-made methods to create double helix structures, and if so, what are the applications of such structures in the fields of science and technology?