Norma Nazario didn’t understand what had motivated her 15-year-old son to subway surf. Then she found his phone.

In about one out of every 800 people, two chromosomes fuse together to form an unusual bond. These are known as Robertsonian chromosomes. It's a mystery that has long stumped scientists.

BOTTOM LINE: The New York Yankees will try to keep their three-game home win streak intact when they take on the Chicago White Sox. New York is 90-68 overall and 46-31 in home games. The Yankees have ...

Perform calculations on lines, polygons, planes and circles, including normals, intersections of objects, distance between objects, and tangent lines. Throughout this library, lines can be treated as ...