A recent study published in Physical Review Letters discloses the discovery of a new form of atomic nucleus. Unlike other nuclei (how often do you get to use that word in an article?), this one is pear-shaped.
If you have the right equipment handy, you might want to take a peek at some Radium-224 or some Barium-144. That's where you'll find it.
Until this discovery, it was assumed that the atomic world exhibited symmetry. A pear-shaped nucleus, obviously, does not: