Perhaps such a transition will be increasingly adaptive. Faced with growing ecological and social crises, the current ...

This finding documents smoke-dried mummification of the dead, mostly in tightly bound crouched postures, from archaeological ...

Edited by Alexander M. Klibanov, Massachusetts Institute of Technology, Cambridge, MA, and approved June 12, 2013 (received for review January 30, 2013) We hypothesized that a temperature-memory ...

This is an addendum toComplex viscosity of helical and doubly helical polymeric liquids from general rigid bead-rod theory ...

Journal Club posts are short news stories featuring a recent important, timely journal article selected by one of our Journal Club panelists, who are post-doctoral associates and graduate students in ...

PNAS depends, in part, on the payment of article processing charges (APCs) to finance its operations. Papers are accepted or rejected for publication and published solely on the basis of merit. For ...

Recommender systems use data on past user preferences to predict possible future likes and interests. A key challenge is that while the most useful individual recommendations are to be found among ...

Edited by Peter H. Gleick, Pacific Institute for Studies in Development, Environment, and Security, Oakland, CA, and approved December 21, 2011 (received for review June 20, 2011) In formulating ...

We have developed a synthetic gecko tape by transferring micropatterned carbon nanotube arrays onto flexible polymer tape based on the hierarchical structure found on the foot of a gecko lizard. The ...

Edited by Barbara J. Finlayson-Pitts, University of California, Irvine, CA, and approved December 15, 2009 (received for review October 2, 2009) The fact that nucleation takes place at sizes below the ...

We show that for thousands of years, humans have concentrated in a surprisingly narrow subset of Earth’s available climates, characterized by mean annual temperatures around ∼13 °C. This distribution ...

There is a saying on Wall Street that “it takes volume to move stock prices.” A number of studies have analyzed the relationship between price changes and the trading volume in financial markets (1 – ...