Relative dating articles
There are many small, inexpensive ways to send smiles to a loved one who may be too far away or too ill to visit.
Worried that he has gotten the free-spirited Mindy pregnant after an unprotected one-night stand, Fred feigns romantic interest and sticks by her side for twelve hours to make sure she takes both doses of the morning-after pill.
Tree rings: each ring represents one year's growth.
The appeal of dendrochronology as a dating tool is that it is objective and entirely independent of other evidence such as datable design features and documented information.This is because the number of rings in the sapwood varies widely, with some estimates suggesting that the range may be from 15 to 50 rings in the sapwood of mature oak trees in 95 per cent of the cases considered in the UK.In Kent, 18 samples of oak taken from different medieval timbers indicated a smaller range of 15 to 35 sapwood rings.In practice, samples are prepared by the dendrochronologist either from cores drilled out of the timber or, if the timber is to be replaced as a result of a repair, by taking complete slices through the whole timber. The hole may be filled with a dowel to disguise it, but nevertheless some damage is done to the timber.Slices on the other hand are far more destructive but give the most clear picture of tree ring sequences.