Now Hernandez knew why they needed to be changed
but Colin learned the hard way.
One sci fi theme in time travel stories says that because the Universe is expanding
and the Earth is moving through space
when you materialize in your time machine the Earth won't be where you
left it,but somewhere else in space.
IOW you'll materialize in airless space,all by yourself
The Alpha Centaurians had mastered the problem of a expanding Universe
but never could get the hang of a Earth moving in a orbit
arund the Sun.
Which meant it helped to be a alligator
person whilst you spent some time
in airless space.
And so the second the Dentist shifted her into time,the TASSTE fell away from the Earth in a rather strong
hurricane of wind as the Earth continued with
its orbit,leaving the TASSTE behind.