Have a friend who went to Europe to play pro team handball, for a Swedish team I think, for a year after dental school.
I never heard of the sport until he told me about it. He described it as kinda like a cross between soccer, football and water polo, w/o helmets, said they're all nuts.
Of course, my buddy Jeff is nuts; talked some of his frat boys into flying over to meet him and run with the bulls in Pamplona that summer, then years later, went back with some of them and did it again.
Don't know when it became an Olympic sport, but it is this year:
TEAM HANDBALL - THE BEST SPORT EVER - YouTube
USA Team Handball Introductory Video - YouTube