Dollars from Debris

Extinct and extant sand dollars (Clypeasteroida: Echinoidea) from Uruguay.

We summarize information concerning Recent and Pleistocene-Holocene Uruguayan sand dollars (Mellitidae), as well as Miocene taxa (Monophorasteridae). Recent and Pleistocene-Holocene species (Encope emarginata, Mellita quinquiesperforata, and Leodia sexisperforata) are at their southernmost limits of distribution, with only E. emarginata recorded further south than Uruguay. Lower temperatures to...

Fossil Sand Dollars (echinoidea: Clypeasteroida) from the Southern Brazilian Coast

Quaternary sediments along the southernmost portion of the Brazilian coast are rich in fossil remains of various terrestrial and marine organisms. This paper presents a description of fossil irregular clypeasteroid echinoids found in this area, with observations on their taphonomy. The identified taxa are Encope emarginata (Leske) and Mellita quinquiesperforata (Leske), although the latter is v...

Money, Credit, and Euro-Dollars

Toxicology: judge data or dollars?

activity of DDT analogs and polychlorinated biphenyls. levels of organochlorine residues and risk of breast cancer. Environmental hormone disruptors: evidence that vinclozolin developmental toxicity is mediated by antian-drogenic metabolites. Dietary estrogens act through estrogen receptor-mediated processes and show no antiestrogenicity in cultured breast cancer cells. The knowledge gained by ...

Trading Dollars for Dollars: The Price of Attention Online and Offline

Recent years have witnessed a crisis in journalism. Newspaper staffs have been cut by a third since 2000 (Pew Research Center 2013). Stock prices of major newspaper companies have fallen by more than half over the same period. The costly work of gathering, interpreting, and disseminating news—activities widely believed to have large positive political and social externalities (Downs 1957; Becke...