Abstract: Since its first use by Euler on the problem of the seven bridges of Königsberg, graph theory has shown excellent abilities in solving and unveiling the properties of multiple discrete ...

Peripheral artery disease (PAD) is a circulatory condition where the arteries narrow and reduce blood flow to the limbs. It’s usually caused by atherosclerosis, a buildup of fatty deposits in the ...

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We look into the mental health crisis affecting American youth. By Sam Sifton I am the host of The Morning. The numbers are staggering. Nearly one in four 17-year-old boys in the United States has ...

Astronaut Jim Lovell, who died Aug. 7 at the age of 97, was a pilot and an astronaut, undertook multiple space missions, was a father of four, built a successful career in business and was honored by ...

Get tested: Because unhealthy cholesterol numbers often don’t cause symptoms, especially at first, it’s important to get tested. You can be slim and feel healthy and still have a cholesterol problem.

Sven, a sales leader, received a call from a major customer who was furious. Their order arrived late, the product was damaged, and to top it off, their invoice didn’t reflect the volume discount ...

I have been doing Auto Upholstery on my own since 1980. Being self-taught from an early age. I have always been guarded to share any of my knowledge because of competition, but now I realize that I am ...