There are two theories we have that explain all the particles and their interactions in the known Universe: General Relativity and the Standard Model of particle physics. General Relativity describes gravity perfectly everywhere we've ever looked.
I met George Jetson and his family in the 1990s through television reruns. In my childhood summers, I spent days watching Cartoon Network's Boomerang channel, which featured cartoons of yesteryear. The Jetsons, a classic that made its debut in the early 1960s, imagined life for the American family around the year 2062.
In 2013, neuroscientist John Cacioppo recorded a video for the AARP about overcoming loneliness. John, a leading researcher in social neuroscience, talked about the loneliness from losing a spouse: "It can feel like the end of the world."