Quantum calculations amount to sophisticated estimates. But in 1931, Hans Bethe intuited precisely how a chain of particles ...

Bethe偶然发现了一个完美的量子理论，一个适用于任何数量粒子的理论。然而，他从未用它来解释现实世界的磁铁。它适用于磁链，但不适用于他设想的原子块。相反，它将以其他方式证明它的价值。

Durham trailer maker Donahue Manufacturing, in business since 1962, has closed. An email from accounting manager Holly Bethe said the closure was because of “current market conditions and funding ...