We reiterate that geological observations do not require Grand Canyon carving coeval with Colorado River integration. (U-Th)/He data from the western canyon, totaling 29 reproducible analyses from six samples and two labs, compellingly support an ancient canyon. Three dispersed analyses from one anomalous sample do not refute this conclusion, nor do the claimed shortcomings of our modeling have...

(Dated: February 1, 2008) A normal-fluid component varying as T is observed at very low temperatures in superfluid He and He-He mixture films adsorbed in alumina powder. The normal fluid appears to arise from thermally excited third sound that has one-dimensional propagation characteristics. A Landau model of third sound excitations in an infinite cylindrical pore by Saam and Cole provides good...

Films of isotopic mixtures of helium have been studied using x-ray specular reflectivity techniques. In contrast with superfluid He films, x-ray exposure causes a reduction in the thickness of He films above the superfluid transition as well as films of pure He and He/He mixtures. One proposed model that could account for this effect is a charging model, in which thinning is caused by electrost...

Flowers and Farley (Reports, 21 December 2012, p. 1616; published online 29 November 2012) use thermochronometry to propose that the western paleo–Grand Canyon was nearly as deep 70 million years ago (Ma) as today. However, lithologies, facies relations, geomorphology, and paleotopography of Miocene interior-basin deposits near the mouth of the Grand Canyon show that no paleocanyon existed in t...

Cytogenetic analyses using C-banding and chromosomal digestion by several restriction enzymes were carried out in four populations (named A, B, C and D) of Hypostomus prope unae (Loricariidae, Hypostominae) from Contas river basin, northeastern Brazil. These populations share 2n=76 and single NORs on the second metacentric pair but exclusive karyotype forms for each locality. Populations A and ...

An experiment was performed to test the hypothesis that the outcome of a vocal nonverbal attempt at persuasion can be affected by the participants' skills in nonverbal communication. Subjects' vocal sending or vocal decoding abilities were pretested. Senders and decoders were agents and recipients, respectively, of social influence in a field experiment in which social influence took the form o...