Isaacman became the first private citizen to conduct a spacewalk. But his longstanding ties with Elon Musk's company SpaceX ...

A new Boston University study of 77 deceased male ice hockey players found that their chances of developing the degenerative brain disease known as CTE increased with each year they played the sport.

Thompson, a 50-year-old father of two, spent two decades at UnitedHealth Group before his shocking death. Tributes are pouring in from coworkers and public officials in his home state of Minnesota.