Rapidly cooling lava can create such spherical formations, and meteorite impacts can cause rocks to evaporate and then cool down into similar structures. The NASA team stated, “If the rock formed from ...

This suggested that the so-called "isospin symmetry" between up and down quarks might be broken by more than expected due to the differences in their electric charges and masses—a discrepancy ...

This suggested that the so-called “isospin symmetry” between up and down quarks might be broken by more than expected due to the differences in their electric charges and masses – a discrepancy that ...