You Age Faster On A Mountaintop

Knocker-Uppers? Yes, and also colliding galaxies, wormholes, and other mind-blowing adventures with time.


The Known Universe - Take a journey from the Himalayas through our atmosphere and the inky black of space to the afterglow of the Big Bang, using the world's most complete four-dimensional map of the universe. As you travel, you'll be going back in time.
Ancient Earth Globe - See a spinning scientifically accurate representation of the Earth as it looked at any point over the past 750 million years. You can even put in a city name and see how that particular spot has changed over those same millions of years. Oh, and if you like dinosaurs, click this "Back to Dinosaur Database" link and do a deep dive into dinosaurs.
Before Alarm Clocks, There Were ‘Knocker-Uppers - From the early 1800s through the 1960s, factory workers didn’t have alarm clocks, so...
What Will We Miss? - Ever wonder what you might miss in the future?
Why Time Passes Faster Atop a Mountain Than at Sea Level - The 'river of time' might be flowing, but it moves at different speeds, and perhaps not at all like we think it does.
The 4th Dimension: Tesseract Made Easy - Carl Sagan makes a time-twisting concept sound simple. Or, for another approach, the Science Elf takes an even more visual route to explaining it: A Beginner's Guide to the Fourth Dimension.
Want to "Tesser" Across the Universe? Instantaneous time-travel between planets and stars is not as easy as it looks in Madeleine L'Engle's book, A Wrinkle in Time, nor in the Disney film adaptation. However, "tessering" might be possible...