A Wrinkle in Time
Why haven't the children been fed since they left earth?
In chapter 6 the happy medium
In chapter 6 the happy medium
Although they may feel hungry, travelling through time/space is not the same length of time as it is on Earth so the hunger is not immediate.
To add on to Aslan's comment, the science of itself is that the wrinkle in time literally is bending time by a very large margine.