Simplify the following text for a Grade 14 native English-speaking person.
Original: The range of such variances in ordinary life , where even considering space travel , are not great enough to produce easily detectable time dilation effects and such vanishingly small effects can be safely ignored .
Simplified: In ordinary life , where people move at speeds much less than the speed of light , even considering space travel , are not great enough to produce easily detectable time dilation effects , and such vanishingly small effects can be safely ignored .