A lot of amazing inventions, ideas and technologies came about in the 21st century, but we want to know: Which tech invention do you think was the most important during this time?
Tell us which tech invention of the 21st century was the most important to you personally - or to society as a whole - in the comments. Was it a small gadget? Or was it perhaps an elaborate technology?
Image by Yuganov Konstantin/ShutterStock
Eureka is our week-long meditation on the wonders of invention, inventors and genius.