Henric did read about the prime meridian...yes...he did...he just couldn't remember it. Okay...think..Henric..think.. He waited and listened to his classmates answers before raising his hand up so he could add more points,"Yes...I believed they are quite important because without it, we will find it difficult to determine its exact location by just the description alone, we need some sort of coordinates...somekind of universal language...or standardised system to pinpoint a place and timezone using its geographic grid lines."