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rtlt
'rtlt' - used as a noun
1. the elapsed time it takes for a signal to travel from Earth to a spacecraft (or other body) and back to the starting point
Variations of 'rtlt'
 
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To live anywhere in the world today and be against equality because of race or color is like living in Alaska and being against snow. - Click here to find out.
Fact of the day
The coliseum in Rome was used regularly for about 400 years.