1 What Are Foundations? Surely we want solid foundations. What kind of castle can we build on sand? What is the point of devoting effort to balconies and minarets, if the foundation may be so weak as to allow the structure to collapse of its own weight? We want our foundations set on bedrock, designed to last for generations. Who would want an architect who cannot certify the soundness of the f...

On 26 September 2014, Johan van Benthem, Professor of Pure and Applied Logic, delivered his valedictory lecture in the auditoriumof theUniversity of Amsterdam. Modern logic is the broad, exact science of information directed behaviour that plays an important role in connecting the humanities, exact sciences and social sciences at the university, and which forms the bedrock of our information so...

Background: One of the candidate landing sites for the Mars Science Laboratory is in the Mawrth region of Mars. The candidate landing ellipse is located on highly cratered terrain with extensive bedrock outcrop. Diverse hydrous minerals have been detected from orbit, providing strong motivation for sending a landed mission to this area. However, models for the accumulation of bedrock in the are...

[1] We evaluate the accuracy of 1 m, LiDAR-derived DEMs of an exposed bedrock channel, and use these highresolution terrain models to calculate erosional fluxes between four levels of strath terraces dated previously with Be. Recent investigations into the timing, rates, and processes by which rivers incise their bedrock channels have greatly enhanced our understanding of landscape evolution. H...

1. Background for Quantum Gravity The physics community is embroiled in a profound and far-reaching revolution, a revolution that will overturn the bedrock theories of matter, spacetime, and gravity on which almost all of the physical theories of the 20 century depend. This revolution is pressing and urgent and now is the time to choose up sides. At stake is no less than the theory of quantum g...