head_space
purplebar-down

WELCOME TO THE 4th DIMENSION!

dimension_strip1a
dimension_strip1b
dimension_strip1c

According to Einstein , you need to describe where you are not only in three-dimensional space — length, width and height — but also in time.

dimension_strip2

Time is the fourth dimension. So to know where you are, you have to know what time it is.

dimension_strip3

Your complete answer should be "I'm sitting on a 4-foot-high aardvark at the northeast corner of Bern St. and Ulm St., and it's July 1st, 2002, at 1:23 p.m. on my watch." Einstein called a description that used four dimensions an event.

*By "space," we mean the space that is all around us, not just outer space.

purplebar
button_rel_off
button_mass_off
button_light_off
button_hole_off
button_time_off
Image credits

You might also like...

Take your imagination on a wonderful, mind-bending trip with these "thought experiments"!

Einstein believed that messing up was a part of being successful-an idea that, itself, has proven relevance.

Test your knowledge about the things we can't see.
Image Credits:

Kid photos: courtesy of Denis Finnin, AMNH; It's All Relative: Jim Paillot; Rabbit, elephant, and ant: Francesco Santalacia; You Light Up My Life!: Cathy Sanchez Duvivier