Latest about united states
Killer Chemistry: The Chemical Weapons of World War I (Photos)
After World War I showed the horrific effects of chemical weapons, world leaders mobilized to contain these new weapons of mass destruction.
Life Expectancy in South Korea May Reach 90 by 2030
Life expectancy is expected to rise in many countries around the world, but in the United States, that increase is predicted to be smaller than in other countries, a new study finds.
It's Official: 2016 Was Second Hottest Year for US
2016 was the second hottest year on record for the U.S. and the 20th consecutive year above average.
100 Years of Infectious Disease Deaths in US: Study Shows What's Changed
We've come a long way in treating infectious diseases over the last century, but in recent decades, the rates of death from some infectious diseases have actually increased.
Beyond the Pyramid: How Food Guides Vary Around the World
Goodbye, food pyramid — hello, food pagoda!
Top 10 Leading Causes of Death
From heart disease to diabetes, we count down the top 10 leading causes of death in the United States
Protecting Pregnant Women in the US from Zika Is a Top Priority, Officials Say
Outbreaks of the Zika virus are likely to occur in the United States; so to prepare, health officials are developing plans to combat Zika that focus on protecting pregnant women from the virus.
