3 ms·
Some of the answers at https://physics.stackexchange.com/q/33840 https://physics.stackexchange.com/q/33840 explain why "everything always moves at the speed of
by creata 2y ago
Some of the answers at https://physics.stackexchange.com/q/33840 https://physics.stackexchange.com/q/33840 explain why "everything always moves at the speed of light in a 4D spacetime" is a statement that, at best, has no content.