Changes

*GPS, the satellites experience time dilation due to the difference in speed and the strength of gravitational field between the satellite and the ground. This is corrected by daily synchronisation between the ground and the atomic clocks in the satellites.

*GPS, the satellites experience time dilation due to the difference in speed and the strength of gravitational field between the satellite and the ground. This is corrected by daily synchronisation between the ground and the atomic clocks in the satellites.

*While most elemental metals such as [[silver]], [[zinc]] and [[mercury]] have a silver/grey appearance, some metals like [[gold]] and [[copper]] do not. This difference can be explained using relativistic quantum mechanics.

*While most elemental metals such as [[silver]], [[zinc]] and [[mercury]] have a silver/grey appearance, some metals like [[gold]] and [[copper]] do not. This difference can be explained using <ref>http://www.fourmilab.ch/documents/golden_glow/relativistic quantum mechanics</ref>

== Paradoxes ==

== Paradoxes ==