An entrepreneur in Washington, D.C. is hoping to grow a new business by teaching people how to properly smoke marijuana. Named the 'D.C. School of Mary Jane' the weed teaching school intends to teach ...

It's a number to celebrate -- 3.9 million. That's the likely number of Americans saved from lung cancer since 1970 with ...

Take a puff of nicotine for the first time, and your DNA plays an important role, alongside social and environmental factors, in shaping what happens next. In recent years, scientists have identified ...