To say that the human body is an intricate complicated system would be an understatement. When one thing goes wrong, others often follow suit. So in 1970 when Alvan Feinstein first coined the term ‘comorbidity’ — to refer to a person having multiple diseases at the same time — it wasn’t too revolutionary a concept.

How can you get your next great idea? One way is to ask other people, and many of them, even a crowd. Crowdsourcing — harnessing the wisdom of the crowd to attain a common goal — is used for an impressive array of tasks, from learning how to eat sustainably, to redesigning cities with open government, creating apps with hackathons, and annotating data for machine learning. When you need help in such instances, you are almost guaranteed to find a ready army of volunteers online.

In 1961, something momentous happened at a squat, nondescript factory in the tiny town of Ewing, New Jersey. The Unimate, a robotic arm, was fired up for the first time, grabbing pieces of hot metal off an assembly line and welding them onto car bodies while onlookers cheered — the world’s first industrial robot had officially been put to work.

Every decade has an exercise trend or two that defines it. Step aerobics and the Thighmaster were popular in the ‘90s, for instance, while exer-gaming and CrossFit were all the craze in the 2000s. To know what’s trending this decade, look no further than your wrist (or to those around you) — chances are it’ll be adorned with some sort of wearable device, fitness tracker, or smartwatch.