An 82-year-old woman underwent what was thought to be uneventful PEG tube placement. One year later she presented with diarrhea and feculent vomiting. A CT scan revealed a 1.5 cm gastrocolic fistula tract – and the internal bumper of the feeding tube in the distal transverse colon (Figure 1). Presumably, at the time of G-tube placement, the feeding tube was inadvertently inserted into the stoma...

The Haber–Bosch process for the commercial production of ammonia demonstrated in 1913 was a watershed event in the mass production of urea, the principal nitrogen fertilizer for modern agriculture. Today, thanks to the so-called “green revolution” starting in in the 1960s, nearly half of the world population relies on increased crop yields, through the use of nitrogen fertilizers, to access aff...