What exactly is an extreme sport? It’s a notion that is hard to define and you will find a lot of adrenaline junkies who will offer different parameters of the definition. Still, if we are to look for something that is common to all types of activities pegged as “extreme” sports, that factor is almost definitely the risk factor. Physical excretion and the threat of injury (or worse) are the hallmarks of extreme sports. So, let’s take a look at the concise history of these thrilling activities.