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  [### Undergraduate students investigate the sulfur isotope record in the Johnston Lab

 ](/blog/undergraduate-students-investigate-sulfur-isotope-record-johnston-lab) February 11, 2021 

 What do sulfur isotopes reveal about the composition of the early atmosphere? Five undergraduates set out to explore this question as part of a short-term research project in the Johnston Lab this January. Over the course of three weeks, the students dug... 

 

 

   [### A very short tribute to the mass spec

 ](/blog/very-short-tribute-mass-spec) January 19, 2021 

 In the Johnston Lab, a lot of research depends on the ability to make very precise measurements of very small amounts of stuff. So, for this inaugural blog post, it seemed only fitting to spotlight the instruments that make the lab’s research (and the...