While we are familiar with the four fundamental states——matter behaves strangely under extreme conditions. At near absolute zero, it forms Bose-Einstein condensates , where atoms lose their individual identity and act as a single "super-atom."
, proved that matter and energy are two sides of the same coin. Matter is essentially highly concentrated energy. In the quantum field theory view, particles aren't "little balls" at all; they are merely "excitations" or ripples in underlying fields that permeate the entire universe. The States and the Unknown matter
Perhaps most humbling is that the "normal" matter we see—stars, planets, and people—accounts for only about . The rest is dark matter (roughly 27%) and dark energy (roughly 68%). Dark matter provides the gravitational "glue" that holds galaxies together, yet it does not emit, absorb, or reflect light, remaining entirely invisible to our current instruments. Conclusion While we are familiar with the four fundamental