科学家提出一种新理论，认为黑洞外面存在一种由质量超小的玻色子构成的粒子云。它们绕行黑洞的形式与电子绕行原子核没什么两样，因此把这种黑洞称为“引力原子”（gravitational atom）。

Three-nucleon force affects nuclear stability, impacting element formation and stellar evolution. The force increases energy ...

A technology once feared too error-prone to underlie a quantum computer is hitting the big time.