I'm not personally a fan of the idea of SUSY and I never have been. But it's possible and we should continue to look for it. For one thing, if supers… - Don Lincoln

Two well-regarded measurements for the expansion rate of the universe disagree, leaving cosmologists very puzzled. It may be that something large has been overlooked in our theory of the . This discrepancy is called the and it has led to a very interesting conversation within the cosmology community.

The history of can be considered nothing less than a huge triumph for science. Over the course of a little more than a century of effort, our understanding of the world of atomic and subatomic physics went from a vague understanding of atoms, to one that is much more detailed. Early in this hundred-year-long period, we learned about electrons (1897), then how they circle a dense nucleus (1911), followed by the discovery of the s (1917) and s (1932) that form the nucleus. From the 1930s onward, researchers used both cosmic rays and particle accelerators to discover antimatter (1932), and particles that don’t exist in atoms (e.g., the and , as well as a huge number of others).

One of the first scientific concepts taught to children is the idea that matter can be a solid, liquid, or gas. Indeed, if you were to ask most American adults how many there are, the most likely answer you would get is three. It would not be unreasonable to consider this to be common knowledge.
Yet the scientifically savvy know of far more phases of matter than the familiar three. is another, as is . And there are many more that exist at extreme temperatures or pressures. Change the conditions under which matter finds itself, and it will act in unexpected ways.