Research Fellow, School of Earth & Environmental Sciences, University of St Andrews
I am a geologist and geochemist specialising in the evolution of Earth's atmosphere over geological time.
My current research revolves around trying to understand how atmospheric redox proxies are preserved in the rock record. Specifically, I use multiple oxygen and sulfur isotopes to track fluctuations in atmospheric oxygen concentration across Earth history.
Billions of years ago, the rise of oxygen in Earth’s atmosphere caused a worldwide deep freeze
Jun 03, 2020 13:27 pm UTC| Nature
Around two and a half billion years ago the Earth was an alien world that would have been hostile to most of the complex life that surrounds us today. This was a planet where bacteria reigned, and one kind of bacteria in...
Johannesburg in a time of darkness: Ivan Vladislavić’s new memoir reminds us of the city’s fragility
Economist Chris Richardson on an ‘ugly’ inflation result and the coming budget
Why Germany ditched nuclear before coal – and why it won’t go back
Labour can afford to be far more ambitious with its economic policies – voters are on board
Sudan: civil war stretches into a second year with no end in sight