Explaining altruistic cooperation is one of the greatest challenges faced by sociologists, economists, and evolutionary biologists. The problem is determining why an individual would carry out a costly behavior that benefits another. Possible solutions to this problem include kinship, repeated interactions, and policing. Another solution that has recently received much attention is the threat o...

Nearly two million more young Americans under the age of 30 voted in the 2008 presidential elections as compared to the 2004 elections, according to new Census data analyzed and released by CIRCLE. The increase is a continuation of the trend observed in the 2004 and 2006 elections. Youth turnout was 11 percentage points higher than in 1996, which was the low point after decades of decline. Whil...

Webster’s asserts that color is “a phenomenon of light or visual perception that enables one to differentiate otherwise identical objects,” and then goes on to say that the Latin root is celare, “to conceal.” It’s a fine definition, because human perception of color is seamless to the extent that it conceals from us almost every causal detail. This talk will discuss common sources of light, the...

PETRI, S. (1937).-Acta Med. Scand., Vol. XCIII, p. 450. PIRIE, A. (1943).-Brit. JI. QOphthal.. Vol. XXVII, p. 291. POCK-STEEN, P. H. (1939).-Ji. Amer. Med Assoc., Vol. CXIII, P. (Abstract). POLLAK, H. (1943).-Trans. Ophthal. Soc. U.K., Vol. LXIII, p. 69. RHOADS, C. P. (1941).-Jl. Nat. Cancer Inst., Vol. I, p. 511. SEBRELL, W. H. and BUTLER, R. E. (1§39).-Public Health Rep., Vol. LIV, p 2882. SH...

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in bavaria, about 1.7 million children walk, ride a bike or take the bus to school. it is important that they all get to school and back home again safely. in the last few decades, we in bavaria have been able to significantly improve safety on children’s way to school. in the mid 1970s, up to 35 children were killed in accidents every year on their way to school. in the last few years, we have...