When recruits were punched and tackled during a role-playing exercise at the Texas game wardens academy last year, they were taking part in a longstanding police training tradition that critics say ...

Different share classes affect investment benefits, such as voting rights and dividend priorities. Mutual funds share classes vary by when and how load fees are charged and can affect long-term costs.

Physics is the search for and application of rules that can help us understand and predict the world around us. Central to physics are ideas such as energy, mass, particles and waves. Physics attempts ...

Physical sciences are those academic disciplines that aim to uncover the underlying laws of nature - often written in the language of mathematics. It is a collective term for areas of study including ...

Excitons are pairs of bound negatively charged electrons and positively charged holes that form in semiconductors, enabling the transport of energy in electronic devices. These pairs of charge ...