If you've ever wondered how farming spread far and wide, our research on past human societies offers one explanation: contact between different groups often drives change.

It's estimated that 1.3 billion people will use English as a first or second language by 2050 . The 'Worldspeak' conference this year discussed the world wide spread of English. Other conventions ...

It's estimated that 1.3 billion people will use English as a first or second language by 2050 . The 'Worldspeak' conference this year discussed the world wide spread of English. Other conventions ...