First,the arrangement of stones at Mystery Hill is similar to that of some stone structures that are well known in Europe.For example,Stonehenge,an ancient monument in England,includes large stones that align with astronomical events,such as the position of the Sun at sunrise on the longest day of the year.Certain stones at Mystery Hill align with the same events in precisely the same way.This same arrangement at both locations suggests that the builders of Mystery Hill were inspired by European monuments. Second,researchers discovered a large flat stone at Mystery Hill that appears to have an early type of European writing carved into it.The particular writing system,consisting of straight lines,was used by Irish people in Europe,starting about 1,500 years ago.The presence of a stone containing very old European writing at Mystery Hill suggests that Europeans were present at the site long ago. A second theory is that meteors striking the Moon cause TLP.Because the Moon has no atmosphere,meteors often reach the lunar surface.In fact,meteors strike the Moon every day.According to the meteor theory,when meteors strike the lunar surface,they explode,creating enough heat energy to appear as a flash of light to observers on Earth. When people observe TLP,they are actually observing flashes of light generated by meteor impacts. Finally,archaeologists determined that the large stones at Mystery Hill were quarried, or cut from the ground,and then significantly altered by hammering and burning well over 1,000 years ago.The way in which stones at Mystery Hill were quarried and the methods used to reshape them are similar to quarrying activities and stoneworking methods that were widely practiced in Europe in the distant past.Such methods are not generally associated with ancient Native Americans.