It's hoped that such drugs could further cut the risk of heart attacks and strokes, which kill 900, 000 people in the United States annually.

FORBES: Magazine Article

They were probably used by hunters to kill reindeer, mammoth and giant elk and to cut up prey and prepare their skins.

BBC: Signs of earliest Scots unearthed

Studies have found handwashing to cut risk of diseases like diarrhea and pneumonia by half, which otherwise kill a combined two million children a year.

FORBES: Can The Private Sector Drive Meaningful Social Progress? The Case of Global Handwashing Day