Shooters often kill people who are, or presumably once were, close to them. 25 percent killed a parent, child or stepchild, and 23 percent killed a current or former romantic partner. Even some large ...

A muscle strain (pulled muscle) happens when muscle fibers overstretch, causing sudden pain, swelling, weakness, or bruising. Strains often affect the lower back, neck, shoulders, or hamstrings.

Daniel Liberto is a journalist with over 10 years of experience working with publications such as the Financial Times, The Independent, and Investors Chronicle. David Kindness is a Certified Public ...

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Robert Kelly is managing director of XTS ...

Sleep has two phases: non-rapid eye movement (NREM) and rapid eye movement (REM). It also has four stages that repeat in 4 to 6 cycles nightly. Each stage affects your body differently, from light ...