Thymus Essentials. 1  The thymus gland, located behind your sternum and between your lungs, is only active until puberty. 2  After puberty, the thymus starts to slowly shrink and become replaced by fat. 3  Thymosin is the hormone of the thymus, and it stimulates the development of disease-fighting T cells.
Southwest Rapid Rewards. #3 in Best Airline Rewards Programs. The Southwest Rapid Rewards program is most beneficial for budget-minded travelers based in the United States who frequently fly to major cities around the U.S., Mexico and the Caribbean. Southwest offers more than 3,900 flights a day to more than 90 destinations.
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