Sharks could prove human life savers

Asset Location for Retirement Savers

This paper uses data on actual returns on taxable bonds, tax-exempt bonds, and a small sample of equity mutual funds over the 1962-1998 period to compare two asset location strategies for retirement savers who invest in equities through equity mutual funds. The first strategy, ‘defer stocks first,’ gives priority to holding equity mutual funds in a saver’s tax-deferred account, while the second...

Movements of Blue Sharks (Prionace glauca) across Their Life History

Spatial structuring and segregation by sex and size is considered to be an intrinsic attribute of shark populations. These spatial patterns remain poorly understood, particularly for oceanic species such as blue shark (Prionace glauca), despite its importance for the management and conservation of this highly migratory species. This study presents the results of a long-term electronic tagging e...

American Chemical Society meeting. Unnatural amino acid could prove boon for protein therapeutics.

1 APRIL 2005 VOL 308 SCIENCE www.sciencemag.org 44 Protein-based therapeutics are a bright spot for drug companies in troubled times. Their annual market is expected to surpass $50 billion by 2010. But proteins can suffer from problems not found with conventional smallmolecule drugs. Some trigger immune reactions, and proteases and other compounds inside the body can quickly chop them up and cl...

Could Your Pet Save Your Life?

How Slowing Senescence Could Change Life Expectancy

Mortality decline has historically been a result of reductions in the level of mortality at all ages. The slope of mortality increase with age has been remarkably stable. A number of leading researchers on aging, however, suggest that the next revolution of longevity increase will be the result of slowing down the rate of aging. In this paper, we show mathematically how varying the pace of sene...