Like other teachers on this first full week of summer vacation, Mr. T plans to sleep in. Today, at the beginning of his retirement as a full-time teacher, his vast and once-crowded fourth-grade ...

A fearsome shark bite crushes with raw power, yet a tiny piranha delivers unmatched strength for its size. Scientists compare ...

Piranhas are South American fish with razor-sharp teeth and a reputation for feeding frenzies. In fact, piranha means "tooth fish" in the Brazilian language of the Tupi people. However, not all ...

Piranhas’ reputation precedes them. These feisty South American fish are notorious for their sharp teeth, fierce demeanor, and outsized appetites, which allegedly can compel a group of piranhas to ...