Patients presenting with a primary upper gastrointestinal haemorrhage aged below 70 years with a Glasgow Blatchford Score of 2 or less are at a low risk, and can be safely managed in the community.

Sung JJ, et al. Early clinical experience of the safety and effectiveness of hemospray in achieving hemostasis in patients with acute peptic ulcer bleeding. Endoscopy 2011;43:291e5.

There has been considerable interest in the unmanned exploration of Mars for quite some time [4][7][8] but the current generation of rovers can explore only a small portion of the total planetary surface. One approach to addressing this deficiency is to consider a rover that has greater range and that is cheaper so that it can be deployed in greater numbers. The option explored in this paper uses the wind to propel a rover platform, trading off precise navigation for greater range. The capabilities of such a rover lie between the global perspective of orbiting satellites and the detailed local analysis of current-generation rovers. The design of the Wind-Powered Mars Rover is discussed, and the prototype built at McGill University as part of a student design course is described.