Last Thursday, Rep. Anthony D’Esposito, New York Republican, introduced the Define to Defeat Act, which clarifies the definition of antisemitism for federal anti-discrimination laws, solving an equal ...

The name for a family of commercial chemicals usually provides a fairly clear idea of the related compounds within it. An example is organophosphate pesticides. Another is brominated flame retardants.

Astronomers are proposing a new definition of a planet, nearly two decades after a previous such change led to Pluto's demotion. The new definition would add measurable criteria, including ...