Scientists in the U.K. say they have found evidence of humans making fire far earlier than previously thought. Archaeologists working at a site in what's now Eastern England say they found signs of deliberate fire-making going back 400,000 years. Before that, the earliest known evidence of humans making fires dated back just 50,000 years, a 350,000-year difference. The findings were published Wednesday in the journal Nature. Researchers say they could have a significant effect on what we know ab