Air travel is smoother, and a horse will arrive at its destination having been able to sleep naturally - unlike its human team members who have been crammed into upright seats.
The biggest concern facing most drivers and team personnel will be how to ensure they get enough sleep when they are going to bed not long before dawn.
However, the team found that eventually both methods of memory retrieval were as effective in the tasks, meaning that while sleep deprivation affects brain function it does not affect overt behaviour, as previously thought.