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Older adults may grieve intensely over the loss of a person or situation that has been a part of the
Angioplasty. One form is called balloon angioplasty, shown here. A balloon catheter is threaded into
Earth’s history is divided into nested sets of time--eons, eras, periods, and epochs--and is called
Eighteen-year-olds were the largest age cohort in the first year of the war in both armies. Soldiers
Corbel Vault, Interior of Tholos, The So-called Treasury of Atreus
A thin cleft, called the synapse, separates one cell from another.