Hours after my mother read my thank-you letter, she was killed by a drunk driver. That experience changed everything I knew about unexpressed love—and brain science.

However, it wasn’t until July 6, 1785 that the Continental Congress established the dollar as the official currency of the United States: the first step towards creating a national monetary system.

To mark 200 years since the birth of steam power, pupils at Fairfield Primary School, in Stockton, spent their week learning about railways.

To mark 200 years since the birth of steam power, pupils at Fairfield Primary School, in Stockton, spent their week learning about railways.