Tagged With special relativity

Astronaut Scott Kelly returned from a year-long sojourn in space in June. His slightly older astronaut twin, Mark Kelly, stayed home as a control -- part of NASA's twin study to monitor the effects of space on the human body. But there's a physical change that NASA might not be able to measure that easily. Mark is now even older (by about five milliseconds) than his space-faring twin, thanks to special relativity.

Predicting the future is near impossible -- but that doesn‘t stop us all from having a red hot go. Human beings have been predicting the future since the beginning of history and the results range from the hilarious to the downright uncanny.

One thing all future predictions have in common: they‘re rooted in our current understanding of how the world works. It‘s difficult to escape that mindset. We have no idea how technology will evolve, so our ideas are connected to the technology of today.

Astronaut Scott Kelly returned from a year-long sojourn in space in June. His slightly older astronaut twin, Mark Kelly, stayed home as a control -- part of NASA's twin study to monitor the effects of space on the human body. But there's a physical change that NASA might not be able to measure that easily. Mark is now even older (by about five milliseconds) than his space-faring twin, thanks to special relativity.