Early scientific theories—such as those explaining basic phenomena like gravity, burning, and the movement of molecules in ...

When the quark hypothesis was first proposed more than 10 years ago, there were supposed to be three kinds of quark. The ...

The ancestors of cobras and related snakes first emerged in Asia roughly 35 million years ago. Many researchers thought the Elapoidea superfamily of snakes evolved in Africa before slithering their ...

An exhibit at Philadelphia's Science History Institute looks at food science through the lens of the school lunch program. (Emma Lee/WHYY) From Philly and the Pa. suburbs to South Jersey and Delaware, ...