Such questions take us beyond the reach of scientific knowledge. Nor is it ever within the reach of human capacity to explain ultimate causes or show the last connection of any object. We are up against the limit initially exposed by G del's incompleteness theorem. As a consequence of work begun by philosopher Kurt G del in the 1930s, we now know that knowledge can't be both complete and grounded in something else. For example, the rules of chess are complete, but they don't depend on anything else.
Chess is a complete and ungrounded system.
The laws of science, on the other hand, are grounded in the physical world, but they can never be completely known. Every answer in science begets new questions. In the early twentieth century, some mathematicians wanted to place mathematics on firm ground, to perfectly secure the footings of mathematics. Mathematics is inherently incomplete. This logical principle supports the broader understanding that completeness and groundedness are mutually exclusive.