It is the fourth order directly targeting transgender people the president has signed since he took office Jan. 20.

President Donald Trump signed an executive order protecting women and girls' sports from biological male athletes who ...

During the war, German scientists and military officials applied this knowledge in a widespread campaign of biological sabotage. Their target was livestock—the horses, mules, sheep, and cattle ...

but war may cause adverse biological changes at the DNA level, which could have lifelong health impacts, according to a study from the University of Surrey. In the first study of its kind ...

Chemical and biological warfare isn't new. Even in ancient times, war wasn't all swords and longbows. Some examples: Unrestricted use of chemical agents caused 1 million of the 26 million ...