Kuniholm can tell, so long as the tree was felled after 360 A . D . His database reaches backward to that date, starting with ring patterns from contemporary trees _ which can be dated with certainty _ and extended by sequences from older wood samples.
32.
:: The local Bells in the US offer what is called a distinctive ring service where you are assigned more than one telephone number per line, and the phone will ring with different ring patterns ( e . g ., two short rings instead of one normal long one ) when people call your second number.
33.
The sundial, a three-inch square of anodized aluminum with a center post, will have a ring pattern arranged to represent the orbits of Mars and Earth, the word " Mars " in more than 20 languages, including ancient Sumerian, and a message wishing future explorers, human or other, " a safe journey and the joy of discovery ."
