
20210119: Can We Break the Universe?
 01:09: ... spaceship will appear to tick more slowly from the point of view of a stationary observer back on the ...
 02:54: But in the frame of a stationary observer, the ship is just moving ridiculously fast, and doesnâ€™t destroy itself.


20170202: The Geometry of Causality
 01:41: ... of this length contraction and time dilation allows both moving and stationary observers to agree on how much older every one looks at the end of the ...


20160217: Planet X Discovered?? + Challenge Winners!
 04:48: To understand that, you need to draw lights like photon paths between the moving clock and the stationary observer.
